Idling issues...

heres the thing... my stang is up and running ... but!
when i floor it and let the idle come down it start to rev up and down and trys to shut off... i changed the throttle body, the TPS, and a few other things and its not that ... so finally i was like F it and through in my diablo chip back in and problem was completely gone ... and i was like wtf :scratchh: ... so i drove it around for 10-15 minz and when i get back home i notice that my temp is hot ... so i look at the fan and its not on ... so i turned off da stang pull out the chip , started the stang up and everything is fine ... than the fan turns on and the idle problem started up at the same time ... so i'm standing there :scratchh: ... btw my fan is connected differently.... we re-wired it awhile back.... we have it so its always on when the car is on and running ... and i call up my friend and the best conclusion we can come up with is that when the fan is turned on, it either is pulling to many amps or something and its stopping the fuel pump or theres some wires that are not connected right in there... could that be the problem? n-e-other ideas?
THaNks People...
 
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I had the same issue with my car a couple months ago. It was do to an exhust leak where the h-pipe met the driver's side header. When it was reved air would be sucked back in at the leak. Once i finally fixed the leak (which was an entire pain in the butt on its on) it went away.




Novi2kStang98GT said:
heres the thing... my stang is up and running ... but!
when i floor it and let the idle come down it start to rev up and down and trys to shut off... i changed the throttle body, the TPS, and a few other things and its not that ... so finally i was like F it and through in my diablo chip back in and problem was completely gone ... and i was like wtf :scratchh: ... so i drove it around for 10-15 minz and when i get back home i notice that my temp is hot ... so i look at the fan and its not on ... so i turned off da stang pull out the chip , started the stang up and everything is fine ... than the fan turns on and the idle problem started up at the same time ... so i'm standing there :scratchh: ... btw my fan is connected differently.... we re-wired it awhile back.... we have it so its always on when the car is on and running ... and i call up my friend and the best conclusion we can come up with is that when the fan is turned on, it either is pulling to many amps or something and its stopping the fuel pump or theres some wires that are not connected right in there... could that be the problem? n-e-other ideas?
THaNks People...
 
I have this on my '01 GT sometimes... But what happens is it I'm stopped at a light or stop at a stop sign for a second or two (yes I actually stop sometimes :p), and hit the gas, it revs up a bit then stalls out. Same thing if I go from neutral to reverse. Havent figured out what it is but sometimes its there, other times its not. And yes mine is an auto too.
Gagan
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