rough idle?

**01ls1ws6** · 02-10-2007, 10:37 AM

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

**Wheeler99WS6** · 02-10-2007, 10:48 AM

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?

**01ls1ws6** · 02-10-2007, 11:36 AM

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

**Wheeler99WS6** · 02-11-2007, 03:48 AM

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

**joejenkinsglass** · 02-11-2007, 08:33 AM

seems like 500-600 is a little low it does sound like the inj may be dirty

**Wheeler99WS6** · 02-11-2007, 08:48 AM

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.

**joejenkinsglass** · 02-11-2007, 01:13 PM

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

Originally Posted by Wheeler99WS6

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.

**01ls1ws6** · 02-11-2007, 04:13 PM

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

**joejenkinsglass** · 02-11-2007, 09:00 PM

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

Originally Posted by 01ls1ws6

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

**01ls1ws6** · 02-12-2007, 02:13 PM

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?

**TurdsOfMayhem** · 02-12-2007, 02:43 PM

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.

**Y2KPewterSS** · 02-12-2007, 02:51 PM

Have you changed the fuel filter lately?

**hutch1999** · 02-13-2007, 08:24 AM

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

**svt_bolt_99** · 02-14-2007, 06:34 PM

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....

**linegtdt52** · 02-15-2007, 06:44 AM

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.