Rough idle
07-02-2006, 05:42 PM
#1
1st Gear Member
Thread Starter
Join Date: Jul 2006
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Posts: 88
Rough idle
Hi nice site in here,I am new to mustangs and this site. Last week purchased a 99gt.The car runs great but has a rough idle at times.The car has 20600 mi on it and probably has sat for a while,I am running techron in the gas but need some advice,could the iac be bad or need cleaned? Thanks for any posts..........................Gary
07-02-2006, 05:52 PM
#3
2nd Gear Member
Join Date: May 2005
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Posts: 325
RE: Rough idle
For sure check all your vaccum lines. I had the same problem, car stalled sometimes, idled rough, rpm's dipping below 500. Just when I was looking at my IAC I noticed I didnt plug in a vent hose when I removed my air intake a month earlier.......i felt so stupid.
07-04-2006, 04:58 PM
#4
5th Gear Member
Join Date: Dec 2004
Location: In between Your Mom's Titties, skeet skeet..
Posts: 2,045
RE: Rough idle
You may also want to run some known good gas ALL the way through, as in, run 2 full tanks of gas through the engine, and if it still acts like sh-t, then start ripping sensors off....
My initial guess is bad gas... Also, try putting some Dry-Gas in the tank, it'll get rid of the moisture build up, especially if it sat for a while..
JT
My initial guess is bad gas... Also, try putting some Dry-Gas in the tank, it'll get rid of the moisture build up, especially if it sat for a while..
JT
07-05-2006, 02:37 PM
#5
Join Date: Apr 2006
Location:
Posts: 22
RE: Rough idle
i have a 1998 gt with the same problem but mine could be the plugs...there is one on the last cylindar that looks like it hasnt been replaced.......and if its not that it coule be the trigger which is a guess for me....also spray carb cleaner on the manifold and see if the engine kicks or any noise comes with that....but if it still has problems you will have some serious looking around to do
07-05-2006, 03:23 PM
#7
2nd Gear Member
Join Date: Sep 2004
Location: Orlando, Florida
Posts: 228
RE: Rough idle
Most likely one of the problems already listed but just throwing it out that if the midpipe as been changed without proper calibration it can do the same thing..... idle rough, maybe even cut off sometimes.
07-05-2006, 03:28 PM
#8
4th Gear Member
Join Date: Feb 2005
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Posts: 1,907
RE: Rough idle
ORIGINAL: Phirantes
Most likely one of the problems already listed but just throwing it out that if the midpipe as been changed without proper calibration it can do the same thing..... idle rough, maybe even cut off sometimes.
Most likely one of the problems already listed but just throwing it out that if the midpipe as been changed without proper calibration it can do the same thing..... idle rough, maybe even cut off sometimes.
07-05-2006, 03:35 PM
#9
3rd Gear Member
Join Date: Jan 2006
Location: Texas
Posts: 694
RE: Rough idle
ORIGINAL: Gooman
Hi nice site in here,I am new to mustangs and this site. Last week purchased a 99gt.The car runs great but has a rough idle at times.The car has 20600 mi on it and probably has sat for a while,I am running techron in the gas but need some advice,could the iac be bad or need cleaned? Thanks for any posts..........................Gary
Hi nice site in here,I am new to mustangs and this site. Last week purchased a 99gt.The car runs great but has a rough idle at times.The car has 20600 mi on it and probably has sat for a while,I am running techron in the gas but need some advice,could the iac be bad or need cleaned? Thanks for any posts..........................Gary
GL
