4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

idle issue help asap !!!!!!!!!!!!!!!!!!!!!!!!!!

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Old Apr 30, 2007 | 02:43 PM
  #11  
2002GTAUTOVERT's Avatar
2002GTAUTOVERT
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Default RE: idle issue help asap !!!!!!!!!!!!!!!!!!!!!!!!!!

ORIGINAL: bullitt#1600

well it hardly rains in vegas so it can't b that. i did however clean the k@n filter with that oil thing. maybe i put to much and it clogged something up. im going to buy injector cleaner in the morning and try it. c what happens.

if i reset the computer wont i disturb the balance (if i put the factory tune) i mean it's got modified paremeters to my apps. i already put the modded tune in to c if it got erased. i did disconnect the neg cable the other day but it wasn't for 30 min.
yeah it never rains here. well im surprised nobody has mentioned this but.. if its not getting enough fuel.. try cleaning the fuel injectors not with that bs "add to a tank" crap take them out and see if they are clogged, if they are take a compressor and blow it out
Old Apr 30, 2007 | 04:14 PM
  #12  
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kylebgt
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Default RE: idle issue help asap !!!!!!!!!!!!!!!!!!!!!!!!!!

You may have to stop revving your engine, revving it w/o being under load is REALLY bad...keep on doing it and you will spin a rod bearing or **** up a piston ring or snap a rod. With that said replace your IAC.. that is the most common problem.
Old Apr 30, 2007 | 04:16 PM
  #13  
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kylebgt
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Default RE: idle issue help asap !!!!!!!!!!!!!!!!!!!!!!!!!!

ORIGINAL: bullitt#1600

i done checked the i.a.c. i noticed the filter was still a bit oily so im leting it dry out some more. i'm gonna re install it and get some injector cleaner. hope that does the trick. somone told me since i have a k@n i don't nrrd the top part of the maf but aint that what makes the maf?
yup that aint what aint make teh maf. Do not pull the top part off the maf, you need it. Now once yoo done checked the air and fuel move on ova to teh ignition. Replaceyer spark plugs and teh wyeers nxt.
Old Apr 30, 2007 | 07:28 PM
  #14  
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JJ03MustangGT
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From: south carolina
Default RE: idle issue help asap !!!!!!!!!!!!!!!!!!!!!!!!!!

that sounds like a tps sensor or an iac sensor....
Old Apr 30, 2007 | 08:06 PM
  #15  
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Rebornmust_owner
 
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Default RE: idle issue help asap !!!!!!!!!!!!!!!!!!!!!!!!!!

The guy that said "don't use the in tank crap", is right.
Find someone that can pressure clean the injectors by removing the return line,opening the(on a return system) opening the inertia switch and getting the fuel clean pressure up at 60-75 psi,1500-2000 rpmuntil the bottle is empty. That is the best way to clean these injectors.
When the PCM says that it is in open loop it means the pcm is not taking all of the sensors into account cause the car is not warm enough. You may want to look at the engine temp on the scanner v's real temp at the radiator. If the pcm see's that the car is cold but it is actually hot, the the pcm is going to give the engine more fuel to make it warm up faster. Hence a possible idle problem, check the engine temp also
Old Apr 30, 2007 | 08:28 PM
  #16  
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DEALBRk
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Default RE: idle issue help asap !!!!!!!!!!!!!!!!!!!!!!!!!!

[8D]
Old Apr 30, 2007 | 08:38 PM
  #17  
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mustang02racing
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Default RE: idle issue help asap !!!!!!!!!!!!!!!!!!!!!!!!!!

i had a similar problem after i did my heads and cams and it was a vacuum leak, in my case it was just two hoses that were mixed up, make sure the drivers side hose on the valve cover is connected to the airfilter and not the other valve cover, trying to help hopefully u find its nothing big.
Old Apr 30, 2007 | 11:16 PM
  #18  
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bullitt#1600
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Default RE: idle issue help asap !!!!!!!!!!!!!!!!!!!!!!!!!!

well thanks all. lol somone told me to buy that injector add on bottle and did before reading this forum. o well. i ended up taking it to team ford. they called and said i need a new i.a.c. unit i hopw thats the case. u know how mecanics say it's fixed, give it back and u end up returning it. then they fix it and u end up paying for to things. one of witch u didn't ask to fix. as its stands it's only 330 lol thats alot. i could have done that for half the price.
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