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rough idle?

This is a discussion on rough idle? within the Firebird / WS6 forums, part of the Vehicle Specific category; at an idle my trans am has kinda a rough idle. what do yall think it could be? fuel injectors ...

  1. #1
    1 01ls1ws6's Avatar
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    rough idle?

    at an idle my trans am has kinda a rough idle. what do yall think it could be? fuel injectors maybe?

  2. #2
    Senior Member Wheeler99WS6's Avatar
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    black, 05 Roush
    black, 99 T/A WS.6

    are you stock? If not post up what mods you have, and how long has this been happening, is it only at idle, if you give a little gas does it go away, what rpm do you idle at? automatic or Manual?

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    1 01ls1ws6's Avatar
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    ya im stock except for an slp lid and t stat its been happening for about a month, mine idles at like 500-600 rpm and it does seem to go away when you give it gas, its an a4

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    Senior Member Wheeler99WS6's Avatar
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    black, 05 Roush
    black, 99 T/A WS.6

    How many miles on your car? could quite possibly dirty injectors.

  5. #5
    someday joejenkinsglass's Avatar
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    seems like 500-600 is a little low it does sound like the inj may be dirty

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    Senior Member Wheeler99WS6's Avatar
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    black, 05 Roush
    black, 99 T/A WS.6

    My car is A4 also and it idles at 500-600 also while in drive. I think the M6 is programmed to idle a little faster but not for sure. but sounds as if perhaps some seafoam could cure this guys problem. hard to tell for sure with no codes being thrown.

  7. #7
    someday joejenkinsglass's Avatar
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    green
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    mine is also an a4 I rarely drive it but I remember it being around 700 same as my wifes 6m who knows I have heard the guages are for reference only

    Quote Originally Posted by Wheeler99WS6 View Post
    My car is A4 also and it idles at 500-600 also while in drive. I think the M6 is programmed to idle a little faster but not for sure. but sounds as if perhaps some seafoam could cure this guys problem. hard to tell for sure with no codes being thrown.

  8. #8
    1 01ls1ws6's Avatar
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    Sea Foam Whats That? A Fuel Additive, Will It Harm The O2 Sensors Or My Cats? I Just Put Some New Spark Plugs In And It Helped A Little

  9. #9
    someday joejenkinsglass's Avatar
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    its an upper intake cleaner usually it gets sucked into the engine at a high idle how are your wires and coil packs? I have heard good things about sea foam but have not tried it

    Quote Originally Posted by 01ls1ws6 View Post
    Sea Foam Whats That? A Fuel Additive, Will It Harm The O2 Sensors Or My Cats? I Just Put Some New Spark Plugs In And It Helped A Little

  10. #10
    1 01ls1ws6's Avatar
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    i have msd 8.5 wires that are only a month old but im not sure about the coil packs. We the seafoam damage my spark plugs?

  11. #11
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    Is your throttle body dirty? That will make the vehicle idle rough as well, I cleaned mine, and my rough idle went away entirely. I just bought carb cleaner, took of the airbox lid and bellows, and spray some in there and take a soft cloth and wipe it out, spray on the springs and open and close the throttle body....

    I have had like 3 fuel injectors fail in my car since I got it new, so also could be a fuel injector obviously, but you can easily inspect your throttle body yourself.

  12. #12
    Just me Y2KPewterSS's Avatar
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    Have you changed the fuel filter lately?
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    Sarge for AAG Emperor hutch1999's Avatar
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    06 HD Softail
    1998 Trans Am m6

    STP fuel inj. cleaner, it helped my 93' lt1 when i had the same problem

  14. #14
    Junior Member svt_bolt_99's Avatar
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    black / white
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    not trying to hijack anyones thread here, but I also have the same problem. I have changed plugs, wires. My only mod is a MTI lid....my idle is around 500 also ('01 WS6 - 52k miles) and it's rough....

  15. #15
    car smart member
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    You first need to find out if you have any leaks in the intake of makybe any of the intake hoses. Get a can of carb cleaner or fuel injector cleaner and spray over the edges of the intake and hoses and listen for a change in idle. If it does change in idle then you have a leak of some sort. Last time I had an issue, I had a hole in my PCV tube right next to the throttle body. I replaced it with a piece of coolant hoses and that was that.

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