5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

IDEL ACTS UP EVERYTIME CAR IS TURNED ON

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Old 04-13-2007, 03:39 AM
  #1  
MY88CHP
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Default IDEL ACTS UP EVERYTIME CAR IS TURNED ON


Hey how's it going I my name is Carlos
I HAVE AN 88 mustang that I installed a mass air flow conversion kit from ford racing (m-9000-a51) and have been driving it for 3500 miles now and it has started revving to 2000 rpm every time it is turned on regardless of it being cold or hot, then it will drop down to regular idle after 2-3 min. but it will rev again to 2000 rpm if it is left sitting. I also sometimes feel a great hesitation when I gas but itwill pick up and launchthe car if I continue to gas it after a few seconds. The car also seems to lightly sound like it back fires or spits as I am driving down the road. I DID THE idle setting procedure WITH the instructions from ford, but I tried that and itdid not work. Itried changing the tps and the idle air control solenoid as well as checking the fuel regulator but I can't seem to get any reading out of the computer fromford racing.I do not think the computer is bad because Iput it in less that 7 months ago andthe car justrecentlyacted up after 3000 miles of drivingok.Do I need to calibrate it or should it be already set? If you have any suggestions please let me know. Here is a list of the parts I used in my application if it helps:
Parts used on the 88’ Mustang coupe:

Ford racing mass air conversion kit (FMS-M-9000A51)
Ford racing hydraulic roller lifters (FMS-M-6500-R302)
Ford racing adjustable clutch cable kit (FMS-M-7553-B302)
Ford racing clutch kit (FMS-M-7560-C302N)
Ford racing hydraulic roller camshaft (FMS-M-6250-E303)
Ford racing 19lb. fuel injectors (FMS-M-9593-C302)
Ford racing Cobra intake manifold (FMS-M-9424-Z51)
BBK 70mm throttle body (BBK 1501)
BBK fuel pressure regulator (BBK-1706)
Trickflow heads (TFS-51400002)
Tricflow rocker set (TFS-51400510)
Trickflow chromemoly pushrods (TFS-21406700)
Trickflow 3/8 Cobra spacer (TFS51520017)
Powermaster 140amp alternator (PWM-8-57140)
Summit racing protorque starter (SUM820055)
MSD distributor (MSD-8456)
MSD coil (MSD-8227)
MSD 6AL ignition box (MSD-6420)
Stock fuel pump[/ul]
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Old 04-14-2007, 07:43 AM
  #2  
dvargas
 
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Default RE: IDEL ACTS UP EVERYTIME CAR IS TURNED ON

Sounds like yourthrottle cable may be binding. Did you set the TPS sensor or just install it?
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Old 04-14-2007, 10:06 AM
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Joel5.0
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Default RE: IDEL ACTS UP EVERYTIME CAR IS TURNED ON

The fact that you cannot access the system for a self-test should be the first item on your list of things to check ...... http://fordfuelinjection.com/index.php?p=44
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Old 04-14-2007, 10:13 AM
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AdderMk2
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Default RE: IDEL ACTS UP EVERYTIME CAR IS TURNED ON

the car revving up to 2k when you first start it is actually perfectly normal. On initial start up, the IAC motor open all the wayand its like stepping on the gas for a brief second, it runs the RPM's up on the car then slowly brings them down to ensure proper warm up and starting of the vehicle.
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