87 Mustang High Idle

The major weak spot for the 1985 Mustang was the small 7. I have already done a lot of - Answered by a verified Ford Mechanic. This is the fix for a stuck/high/surging idle. I suffered with it for about a week and then "poof," the problem was gone. it either idles too low, or too high or not at all! i. Idle BasicsAll carburetors come with a simple yet efficient idle circuit. If i have the air off it will uually idle fine, but with the air on it surges up and down. How to Set the Idle for a 1992 Nissan Sentra. The information contained in this publication was correct at the time of going to print. Locate the two adjustment screws on the carburetor. The answer to that question depends on the cause of the high idle. I took it back to Firestone twice for the high idle problem since they are down the street from where I work and it wouldn't cost me anything to fix the problem they caused. It was idling way too high and couldn't get it to come down. try reverting this back to 4. I took one out of a known working car, same thing high idle. I then changed the Ignition module, problem came back after 35 minues of. All BBK Performance Power Plus Series throttle bodies are CNC machined from high quality 356 aluminum castings to ensure perfect OEM quality and fit every time. Reconnect your battery's negative terminal. I'm not sure why my car is running so. It was the right car at the right time, but the Mustang had to await the early 1960s, when a savvy Ford exec realized the Mustang's potential. Turn each screw clockwise two full turns. 1 - Try taking the IAC off and clean it thoroughly with carburetor cleaner. 6061-T6 billet aluminum. when the engine is cold it runs fine, it idles fine all the time but as soon as the engine warms up it starts surging and running rough until you give it wide open throttle or idle any insight for me i am getting tired of chasing dead ends with this old ass computer. Some causes are harmless, while others can indicate the need for a repair. When the engine seems to rev up on its own while you are at a standstill, you may wonder if it's a sign of trouble that needs the attention of a mechanic. 0-liter V8 that would give the Mustang so much of its muscle. I took it back to Firestone twice for the high idle problem since they are down the street from where I work and it wouldn't cost me anything to fix the problem they caused. Could be the IAC valve sticking/carboned up. Mass Air Flow - $35. Now by rough I mean idle idles up and down from 1000rpms to about 450rpms. Ford Mustang Idles Too Fast. In the interest of continuous development, we reserve the right to change specifications, design or equipment at any time. EEC IV 2 DIGIT CODES NOTE: When you see "is/was" listed for a code: For a HARD fault code the sensor IS out of range right now. Please Note: This Idle Air Control Motor will work on 2001-2004 Mustangs Built After September 6, 2001. You'll need to make sure your 87-88 Turbo Coupe ecu also comes from an auto trans car. Your idle should be calm after. Manufactured by Accufab in the USA. The IAC solenoid controls changes in the idle during engine load. For your Ford Mustang, try cleaning out your idle air control valve. 87-04 FORD 5. Jan 30, 2015 · This brings up another good point about any Mustang, especially a high mileage one. It was idling at 1500, most of the time, and stalled on occasion. (Note: The engine idle speed is controlled by the computer and is NOT adjustable. i was thinking there is no reason a fule injected motor should do that. Everything has to be on-spec for proper performance. Last saturday (halloween) it started to idle high again, only this time it keeps on doing it. If its running rough/ missing, and everything else is fine i think that indicates a vacuum leak. 0 Mustang will no longer "fast idle" on cold starts. All I did since the last (high idle) test run was to wiggle the connector on the EHA and I pulled the glove box to give a stern look and a wiggle to the idle controller. i have a 87 ranger 2. By haulincats, I have an 87 350 TBI and it idles about 2,000 rpm's. The valve body that Mustang7173 links to is what I was referring to. if I pull a vacuum cap off the tree, and introduce a air leak, it will run at 1100 or so RPM forever. Oct 27, 2019 · OK, in a nutshell. my buddy and i think its a vaccum leak but ive spent. Featured Pro-M Racing Products. 9 that i have done alot of work too. During one high. Is the speedometer sender gear-driven, or all electronic? While only the 83-93 Mustangs use a speedometer cable, the speedometer sending unit is gear-driven from 1983 through 1998. I set my idle just like it says here: Ford Mustang Base Idle Reset It idles rock solid but when I go drive it for a bit it will start hanging between shifts. but there was one more problem at random times i mean random the idle would go up to about 2k whan in nuturl but. If the IAC number has not increased, then review the article above regarding high idle from a vacuum leak or high idle from sticking linkage. AFAIK this article is the only place where Ford mentions this. Mustang Wiring, Fuel Injection, and EEC Information, Use the information at your own risk. I pulled over and shut it off, started it up again and it was fine. By then the temp was up to around 190°, and I new the thermostat had opened up, because the radiator had gone down. Browse our selection of Fox Body Mustang parts and accessories today to find everything that you need for your pony!. Re: Ported vs manifold vacuum advance March 22nd, 2012, 02:54 PM OK, so we don't get too far off topic, is the amount of vacuum in ported proportional to the amount of air going through the venturi and effected by such or a manifold vacuum function when the throttle plates start to open and retards was manifold vacuum falls?. Huge array of valve lx and many similar products. com: Automotive Aftermarket Performance Parts by Edelbrock, LLC. It holds there or fluctuate from 5500 - 6000 and will not release. 0 Mustang will no longer "fast idle" on cold starts. The success of the first-generation Mustang inspired other automotive manufacturers to develop similar vehicles, but the Mustang is the true American original. 0L V8 Engine Whipple install High Idle P0507. Ford Mustang 2000, Fuel Injection Idle Air Control Valve by Standard®. Wiki User 10/26/2011. Hi there! Problem I have a 1987 Suzuki Samurai with a stock Hitachi carb that. what location is throttle/idle ajustment screw? any pics that show that area? i dont want to dial up or down the wrong screw. 2800+ stall converter. May 24, 2011 · Mustang Idle Problems 5. How to Fix High Idle Step by step automotive repair guide on how to troubleshoot and fix an engine that is idling high (fast) or low (slow). An engine that is idling too high may be caused by a faulty idle air control motor valve that has completely failed or that has simply become weak and is not functioning correctly. The idle air control motor (IAC) controls changes in idle caused by engine load. how do i adjust the idle on thi smotor i am new to the 5. Sep 03, 2002 · If I am sitting at a light and push in on the throttle linkage then it will idle down, but as soon as I let off it comes right back up. 2006 Mustang GT P2196 Trouble Code and High Idle My Mustang sometimes idles extra high (3500 rpm) at a cold start and has done this for about a year but I don't. now, i have an 89 mustang that is having idle and surging issues. The Racer Walsh Stage 2 camshaft is a street / competition grind. This one is driving me crazy! I has spend about $1,000 in parts and repair time at a local shop. The Idle Air Control Adjuster spacer service kit is used to correct idle issues that you may have after modifications such as a cam install. 0 High Output and I have a Problem. Free shipping. 1 - Try taking the IAC off and clean it thoroughly with carburetor cleaner. Idle BasicsAll carburetors come with a simple yet efficient idle circuit. 0 stalls at idle (intermittently) - Took the old 5. during the warranty period the dealer replaced MANY items without luck. Has anyone found a solution to the high idle speed issue that seems to be plaguing several members here on the 720 forum? I am having the same problem, and even went as far as installing a rebuilt carb, with no luck. 1987 Mustang LX 5. Aside from high idle issues, low idle and even sporadic stalling can both be attributed to a bad idle control valve. Increased power, air flow, and throttle response. If it settles higher than this, adjust the screw until idle is at 1000 RPM. Wonderful prices of G35 Coupe 2009 and other similar items. Locate A Ac available right now. replace the MAF and Cam postion, as per codes. Allow it to idle for 2-4 minutes to confirm setup. What about part throttle brekpoint. The only way I can stop it is shut off the engine and restart. If all other components of the fuel system are working properly and there is still a problem with the idle speed, the screw may be adjusted. The idle air control motor (IAC) controls changes in idle caused by engine load. 0 and ford motors for matter. i was thinking there is no reason a fule injected motor should do that. 1999-2004 Mustang V6 Performance Parts. cap the leak, it dies. I've learned once again why I like this forum so much. Any adjustments made to the idle speed, should be followed by adjusting your throttle position sensor (TPS). (Note: The engine idle speed is controlled by the computer and is NOT adjustable. Dec 30, 2005 · this advice to avoid servicing transmission on high mileage vehicles is bogus. Increased power, air flow, and throttle response. Get Mustang Sounds from Soundsnap, the Leading Sound Library for Unlimited SFX Downloads. NOTE: When you see "is/was" listed for a code: For a HARD fault code the sensor IS out of range right now. high idle/throttle sticking 3rd Generation '79 - '93. I'll change that ASAP. If you hold the gas and throw it in gear while reving the engine it goes but as soon as you let off it dies. The fuel injected Mustang uses a small motor/valve assembly that allows a specific amount of air to enter the engine to control it's idle. This was after it first happened. Seems to run lean, but o2 sensors show rich code. Mustang) submitted 4 years ago * by applestangg Recently it's been really hot out and I've been using the ac in my 2002 gt. Find New Tires, Wheels, Hubcaps, Rims, and more. It's idling at 2000 rpm. 0 AOD red stock as a rock But i suffer from the high idle/ exsessive fuel being wasted. The computer can't keep up with the info I'm getting a new one tomorrow I'll let you know how I make out. Ford Mustang 8693 MegaSquirt Gen2 Plug and Play for the 1986-1993 Ford Mustang 5. Any help please. this is very very scary in high traffic areas such as when i drive to school every day. It holds there or fluctuate from 5500 - 6000 and will not release. Mar 16, 2017 · Idle Air Controller (IAC) The IAC is blamed and cursed for every idle problem there ever was on a fox Mustang. after 5000 miles it developed a rough idle. This site displays a high quality catalog of listings in stock and ready for shipping on the the internet. How the Ford Mustang Works chronicles the legend from its inception in the early 1960s to today's all-new Mustang. I had the same issue - exessive idle speed just to keep it running in gear. The Engine is idling 2000 RPM. Ive also managed to remove every bit of emmisions on the engine, the only vacuum line i have is the advance from distributor to carb. Start the engine, and set the idle to the rpm you want with the stop screw on the bottom of the throttle body. "You have to be careful with these idle screws," our host notes. This has got to be a computer problem I'm going to change the ecm one proble does not fix itself start another one and be three TPS's no DAMM way. I'm not sure why my car is running so. 0 out today for her maiden voyage, had it timed, and to my surprise, at a traffic light she stalled and took approx 20 attempts to re start it and keep it running. you are giving bad advice when you write, “…don’t service high mileage transmissions…”. Find New Tires, Wheels, Hubcaps, Rims, and more. The word's best Mustang throttle bodies. Idling and driveability problems can be caused by a variety of issues. Edelbrock is the most respected name in performance! Since 1938, Edelbrock has manufactured its core products in the USA for quality and performance. Buy NEW HIGH TORQUE MINI STARTER FITS FORD MUSTANG 302 351 5. The Ford Mustang, with the 4. Locate G35 Coupe 2009 for sale here!. Pay attention to low idle or stalling. Others discover that the car surges, or doesn't idle correctly. after 5000 miles it developed a rough idle. 0 with a super high idle. Motorcraft CX1824 Idle Air Control Motor 90 Mustang GT 302 5. Learn how Lee Iacocca brought his "better idea" to life in 1965 Ford Mustang Prototypes. The Engine is idling 2000 RPM. Jun 19, 2010 · Hi I have a 1987 Mustang GT Convertible 5. Oct 22, 2011 · But after a little while the idle starts surging. Any adjustments made to the idle speed, should be followed by adjusting your throttle position sensor (TPS). RockAuto ships auto parts and body parts from over 300 manufacturers to customers' doors worldwide, all at warehouse prices. The 289 cubic ingh engine was Ford's V8 90 degree overhead valve engine that everyone wanted in the first few Mustang years. Mass Air Flow Sensor MAF 1995-00 Ford Mustang Explorer Ranger. May 30, 2013 · Remember, speed density cars in 86-87 don't respond well to modifications, and in some cases will reject them all together, like a donor kidney. While your rig is idling (high), open your hood and press on the back (close to the fire wall) of the throttle linkage (the part on the throttle body that your throttle cable is attached to and is held back by the spring). Through its Ford Performance division. 872213 NOV 87 A/T - AOD New Overdrive Band Anchor Pin ATRATB8764 NOV 87 A/T - C6 Very Sensitive 3-2 Downshift at Part Throttle 871814 SEP 87 A/T, M/T - New `Mercon' Transmission Fluid ATRATB8754 SEP 87 A/T - Front Bushing Wear ATRATB8748 AUG 87 A/T - Slipping or No-Shift/Metal Sealing Rings. how to adjust idle on 1992 mustang 5. I runs good and sounds very mean better than before but the idle is a little over the 1,000 RPM and when I turn the AC/Heater the it idles from 1,000 to under 1,500 RPM every 10 seconds or so. The idle air control motor (IAC) controls changes in idle caused by engine load. In my 89 TBI 350 I can drive beautiful for 30 minutes, then after a few stop and goes, the idle drops and it almost stalls- then the idle goes high, drops low then stalls. If the PCM offers no hints, the best place to begin looking for problems is with the Idle Air Control Valve/Bypass Air Control (IACV/BAC). Ford Mustang Ecoboost Forum Since 2013 A forum community dedicated to Ford Mustang owners and enthusiasts. It's idling at 2000 rpm. it also may be a misfiring spark. Browse our selection of Fox Body Mustang parts and accessories today to find everything that you need for your pony!. The best High amp alternators can be found from Nations Alternators. Here’s the throttle body relearn procedure. If with these items unplugged the idle speed is correct then I dont think the carb is the problem, although I absolutly hate the carb on my 87, they should have made the first year with TBI. The owner of the 65 mustang also had a 1406, but his idle goes down after warming up, my idle doesn't even do that. 6 Crown Vic motor, when I start it the RPM's go from 1500 down to 600 and back to 1500 continually,even after it warms up, I just took it to AutoZone to have them scan code itit came back P1000 which isn't telling. she doesn't have a tak but im geussing its idling somewhere in the 1. If you have an auto transmission in your 87-90 Mustang and want to use it with the turbo engine (which is a bad idea in my opinion because the trans is weak and you'll kill it if you anything over stock turbo hp), then here is some info for you. New cats and muffler did not help. Looking for Ford Mustang 1972-87 Edelbrock Performer(r) 351W Manifold EGR (idle to 5500 rpm)? Buy Mustang parts and accessories online at Mustangs Plus, your Mustang Parts Restomod experts!. The Ford Mustang, with the 4. It also will idle fine for me too after a good 15 minute drive or so. what location is throttle/idle ajustment screw? any pics that show that area? i dont want to dial up or down the wrong screw. since the temps in Las Vegas have been pretty high lately, i've been having some drivability issues. This Idle Air Control Motor, also known as the Idle Air Control Valve, is a solenoid that bolts to the throttle body on your 2001-2004 GT Mustang. However, if throttle body is replaced AND a proper idle speed cannot be obtained, there is an adjustment which may be made. when the engine is cold it runs fine, it idles fine all the time but as soon as the engine warms up it starts surging and running rough until you give it wide open throttle or idle any insight for me i am getting tired of chasing dead ends with this old ass computer. 1 - Try taking the IAC off and clean it thoroughly with carburetor cleaner. how do i adjust the idle on thi smotor i am new to the 5. The Engine is idling 2000 RPM. except when I won't to gass her and lission to the great. 0 its idle real low at like. 1986-1993 Mustang 5. used 1994 ford ranger for sale - carsforsale. Assassination of his client and always get a chance to participate in a secluded car park. It failed the low idle portian of smog but was clean at the higher rpm portian. This motor is a direct replacement for the 1996-1998 Cobra Mustang with the 4. 1985 also featured the second year of the SVO Mustang. Everything has to be on-spec for proper performance. Jump to Latest I have a 1999 red Mustang GT 5 speed my first one ever I'm a Mopar man myself don't know me on that guy's LOL but love how fast it is. Turn the ignition ON and leave on for several seconds then turn the ignition OFF to allow the ECM to reset the IAC valve. Reconnect your battery's negative terminal. Car always had a bit of a high idle (about 2,000 RPM), but I could live with. Mustang Wiring, Fuel Injection, and EEC Information, Use the information at your own risk. Made to the original factory specifications from OEM quality materials, this Mustang Idle Air Control Valve with Motor is a direct fit OEM Ford replacement part that provides reliable maintenance-free operation. Quote; Post by dorianleclair » Sun Sep 24, 2017 3:16 pm. 872213 NOV 87 A/T - AOD New Overdrive Band Anchor Pin ATRATB8764 NOV 87 A/T - C6 Very Sensitive 3-2 Downshift at Part Throttle 871814 SEP 87 A/T, M/T - New `Mercon' Transmission Fluid ATRATB8754 SEP 87 A/T - Front Bushing Wear ATRATB8748 AUG 87 A/T - Slipping or No-Shift/Metal Sealing Rings. Reader Question I have a 1995 ford mustang 3. It idles perfectly at 750ish (accesories/battery is kinda low) The guy also had the fan wired to a switch, but wired up backwards. When my car is in idel it is very high and the car is running real rich. Ford Mustang EcoBoost Loses Big Power on 87 Octane. The high idle was a vacuum leak - the gasket between the TBI and the intake manifold was bad. The success of the first-generation Mustang inspired other automotive manufacturers to develop similar vehicles, but the Mustang is the true American original. So on Sunday I'm going to Lowes and at a left hand turning red light my idle jumped to 4000rpm at curb idle. Restart the engine, and give it 12-15 degrees of advance at idle, and go for a spin. Welcome To V6Mustang. Everything has to be on-spec for proper performance. For the price, if I ever have to rebuild an AOD, that will be a must. Look at the Ford Probe. download 1994 ford ranger stumbles on acceleration free and unlimited. Not even 30 yeaars ago we were driving vehicles with crude point-triggered ignitions and conventional distributors. It follows a typical path from the float bowl through the main jet, into what is called the idle well, which is a small. high idle/throttle sticking 3rd Generation '79 - '93. The high idle was a vacuum leak - the gasket between the TBI and the intake manifold was bad. , piston rings, rod and crankshaft bearings, etc. Engineering specifications: The Mustang Fox body throttle position sensor (TPS) uses a floating ground-return to the computer. 0L AUTOMATIC TRANSMISSIONS: Starters - Amazon. The idle air control motor (IAC) controls changes in idle caused by engine load. Average failure mileage is 91,000 miles. Finally fixing my foxbody cold start idle problem. Today though it was idling at highway speeds. So on Sunday I'm going to Lowes and at a left hand turning red light my idle jumped to 4000rpm at curb idle. Has new injectors,distributor and most every smog part is new except the air pump. Through its Ford Performance division. This valve is comonly called the idle motor, the IAC (idle air control) or the IAB (Idle air bypass). will the ECU/IAC "learn" over many weeks, or will in never re-adjust, until you do what you are saying to do The problem I have, after the car warms up, you can hear, and see on the tach, it doing a periodic "bounce" down from 900 rpm, or whatever it's supossed to be idling at all the time when warm. 0l? I have to give my car the "anti-idle surge vacuum leak" and it reads 14 inches at idle, and 16 inches with the leak plugged, surging away. How to Fix High Idle Step by step automotive repair guide on how to troubleshoot and fix an engine that is idling high (fast) or low (slow). Well, apparently news of this didn't sit well with Mustang enthusiasts all over, so Ford listened and out came the '87 to '93 generation that sold like hot cakes. I bought this car with a idle problem that I'm stuck on. The 1987 Ford F-150 has 1 problems reported for engine idles high. Locate the two adjustment screws on the carburetor. ️Ford Mustang V6 V8 Mach1 Idle Issue Fixed ️Ford Idle Fix understanding rough, high, surging idle, the Idle Air Control. JEGS offers a huge selection of Mustang parts and accessories. Installed the 3G 130A alternator and heavy duty wiring kit. 7/15/2011 expanded slightly. comment: good for street rods with high stall converter mc1995 hyd 4 234 244 303 313. 1994 ford ranger problems? yahoo answers. 04 Tacoma 2. 0 Resto Idle Air Control Adjuster will put you one step closer to solving your idle problems! It is a must for EFI V8 Mustangs! This thin, adjustable aluminum plate fits between the throttle body and the idle air control motor. The Ford Small Block is a series of automobile V8 engines built by the Ford Motor Company beginning in July 1961. No Vacum leaks, While driving notice idle kicked up check light came on, at the time the battery had died. com! We are the oldest and largest V6 Mustang forum on the internet. A wide variety of mustang engine options are available to you, such as free samples, paid samples. The idle ran high(er) on warm up and then after dropping still high(er) after warm up than normal. The 2007 Ford Mustang has 786 problems & defects reported by Mustang owners. 87-04 FORD 5. try reverting this back to 4. you are giving bad advice when you write, “…don’t service high mileage transmissions…”. Aside from high idle issues, low idle and even sporadic stalling can both be attributed to a bad idle control valve. Not really a high fun-factor mod, but I just can't stand things that are under-engineered so the weak stocker had to go. 0 motor is stock other than K&N in factory box. my buddy and i think its a vaccum leak but ive spent. Seems to run lean, but o2 sensors show rich code. Again, start the engine and compare how it is running at a stop to how it normally runs. Also it'll idle down to about 1000 rpm when I'm coming to a stop but then shoot up to 1500 or higher and stay there. Founded in 1988, Steeda is the leader in Ford performance products specializing in the engineering and manufacturing of parts for the Ford Mustang, Fusion, Focus, Fiesta, and Ford Trucks. 2001 Ford Mustang 3. 0L AUTOMATIC TRANSMISSIONS: Starters - Amazon. Easy to use parts catalog. The answer will divide the possible sources of additional air into two, greatly simplifying the problem. I'm not sure why my car is running so. When the engine is started cold, regardless of the outside temperature, the idle is rough and there is a noticable power loss. In the Idle ICF, the "Target Idle Speed (RPM)" must be programmed to the desired RPM speed at hot idle. Hello, bringing up an old thread but need help. It failed the low idle portian of smog but was clean at the higher rpm portian. If i have the air off it will uually idle fine, but with the air on it surges up and down. 0L V6 engine, is known for a rough idle, engine stalling, loss of power, and misfires, accompanied by the check engine light. This information is from various sources, like my experience, AFM, the Ford Fuel Injection Book, other site members experiences. '87 Mustang 302 Weiand 174 Megasquirt Throttle Body Injection. Classic Industries offers a wide selection of 1965 Ford Mustang parts, including 1965 Ford Mustang interior parts and soft trim, 1965 Ford Mustang exterior sheet metal, 1965 Ford Mustang moldings, 1965 Ford Mustang emblems, 1965 Ford Mustang weatherstrip and unique accessories, to nearly every nut and bolt needed for installation. Any ideas?. injectors, larger throttle body, and even the aftermarket headers. This page covers fuel-injected cars. There have been a lot of advances in ignition technology through the years. This will set them in the "open" position. 0 Resto Idle Air Control Adjuster will put you one step closer to solving your idle problems! It is a must for EFI V8 Mustangs! This thin, adjustable aluminum plate fits between the throttle body and the idle air control motor. 1987 - 1996 F150 & Larger F-Series Trucks - 1987 High idle - hello, i just got through putting together my engine after having a valve job done but my poor truck is idling way to high. There are 161 1967 Ford Mustangs for sale today on ClassicCars. Idle Air Control Valve Iac Speed Stabilizer New Mazda Miata 1990-1993 Ac259. Or, you have a vacuum leak. Edelbrock is the most respected name in performance! Since 1938, Edelbrock has manufactured its core products in the USA for quality and performance. if I pull a vacuum cap off the tree, and introduce a air leak, it will run at 1100 or so RPM forever. You can try cleaning it and see if that improves your idle speed. 0 out today for her maiden voyage, had it timed, and to my surprise, at a traffic light she stalled and took approx 20 attempts to re start it and keep it running. Motorcraft CX1824 Idle Air Control Motor 90 Mustang GT 302 5. replace the MAF and Cam postion, as per codes. Leach and Captain D. The car was built on a fox body platform but featured many high tech features not currently found on Mustangs. I have a completly stock 87 mustang gt. Buy your Lexus Supra right now! Highlighting a lot of lexus supra available on sale online. On the drive to work this morning noticed my idle got very high and was staying around 2k. If i have the air off it will uually idle fine, but with the air on it surges up and down. This is information on how to set your idle rpm. OBD-I Diagnostic Trouble Code (DTC) Applications - 2-Digit Ford Codes Throttle stop set too high - IDLE or Idle Set Procedures : (Service 87 code first if. 6 MUSTANG GT COBRA MASS AIR FLOW SENSOR MAF METER 24 lb # OEM. 510 106 112 3200-7000 very rough 817 comment: good for pro, street, bracket, oval racing. When my car is in idel it is very high and the car is running real rich. Vintage Mustang Forums > General Discussion > Vintage Mustang Forum > Anybody ever drilled holes in the carb butterflies for a better idle thought it was a high. 0 motor is stock other than K&N in factory box. 80457S 600 CFM won't idle! I just installed a refurbished Holley 0-80457S 600CFM carburetor on my 1968 Mustang 289 with Auto Transmission and I can't get it to idle properly. To increase idle rpm the ECM moves the IAC valve out allowing more air to pass by the throttle plate. 0L High Output small-block was introduced. Here’s the throttle body relearn procedure. Made to the original factory specifications from OEM quality materials, this Mustang Idle Air Control Valve with Motor is a direct fit OEM Ford replacement part that provides reliable maintenance-free operation. 99 mustang has high idlesometimes it goes up to 2500 rpms and hangs then goes down. It's perfectly normal for the engine to idle at a high rpm when first started in cold weather so that the engine does not stall due to higher oil viscosity, which in turn causes higher internal friction from the engine's components, i. Posted by Anonymous on Jul 10, 2010. The car is a manual trans so I don't need idle up function for automatic. com, there are several reasons vehicles idle low. 0 and 1986-1988 Ford Thunderbird 5. 87-95 FORD MUSTANG Idle Air Control Iac Delete Plate - $8. but there was one more problem at random times i mean random the idle would go up to about 2k whan in nuturl but. Go for a test drive and enjoy the smooth idle. 0L AUTOMATIC TRANSMISSIONS: Starters - Amazon. 0 its idle real low at like. Ive also managed to remove every bit of emmisions on the engine, the only vacuum line i have is the advance from distributor to carb. In the interest of continuous development, we reserve the right to change specifications, design or equipment at any time. 99 mustang has high idlesometimes it goes up to 2500 rpms and hangs then goes down. Come join the discussion about performance, turbo upgrades, modifications, troubleshooting, maintenance, and more!. SYMPTOM SUMMARY The engine idles too high. 0 Supercharged. « on: March 16, 2011, 02:34:52 am » After performing what I consider to be some very basic work on my 1988 5L Mustang 3 weeks ago, the engine will no longer "fast idle" when started cold.