Rough Idle
05-03-2004, 07:48 PM
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Rough Idle Ever since I have owned the car I notice that when Im sitting at a light the car tends to idle rough intermittently. Its like clock work. It will idle what seems to be smooth then hit a rough patch, idle smooth then hit a rough patch. Meanwhile the rpms dont change at all. Is this a characteristic of LS1s? Its not extremely rough, but enough for me to recognize it. Other then that the car runs great.
05-03-2004, 08:43 PM
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Im actually wondering what the symptoms of a bent pushrod are and if this could be linked to that potential problem. Im paranoid right now and hoping thats not the case
05-03-2004, 08:46 PM
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Originally Posted by WhitePheonix
Im actually wondering what the symptoms of a bent pushrod are and if this could be linked to that potential problem. Im paranoid right now and hoping thats not the case
05-03-2004, 08:51 PM
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Are you the original owner of the car? If so how high have you revved it. Im pretty sure the rev limiter on my car is at stock setting. Most posts state you will not bend the pushrods my reaching for the rev limiter. Even so Im concerned.
05-03-2004, 11:51 PM
#6
Yes, my idle is rough most of the time and it sits at 500rpm in drive. I notice that sometimes it is smoother than others. I have no idea why, but it bugs me. I've been thinking I should change the fuel filter, but I doubt that'll help. My car is mostly stock w/39,000 miles and the plugs and wires have not been changed.
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05-06-2004, 06:47 PM
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Please give me explicit directions on how to clean the Idle Air Control Valve. I am a newbie when it comes to the TB and I dont want to eff anything up.
05-06-2004, 07:25 PM
#10
bent pushrods normal end up with a ticking sound.
Remove lid, MAF, and Maf to TB hose.
Remove the 3 screws holding the TB on.
Remove the 3 hoses attached to TB. I use the TB screws to plug the coolant hoses so they don't leak.
Take the TB off.
Put a clean rag in the intake to keep dirt out.
There are only two items on the TB, the TPS and IAC. Both come off with a torx.
I doubt the TB needs any service. I'd look at the plugs and maybe wires.
At 500 rpms, A4 tend to occassionaly idle poorly.
Remove lid, MAF, and Maf to TB hose.
Remove the 3 screws holding the TB on.
Remove the 3 hoses attached to TB. I use the TB screws to plug the coolant hoses so they don't leak.
Take the TB off.
Put a clean rag in the intake to keep dirt out.
There are only two items on the TB, the TPS and IAC. Both come off with a torx.
I doubt the TB needs any service. I'd look at the plugs and maybe wires.
At 500 rpms, A4 tend to occassionaly idle poorly.
05-06-2004, 07:39 PM
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Originally Posted by Ragtop 99
bent pushrods normal end up with a ticking sound.
Remove lid, MAF, and Maf to TB hose.
Remove the 3 screws holding the TB on.
Remove the 3 hoses attached to TB. I use the TB screws to plug the coolant hoses so they don't leak.
Take the TB off.
Put a clean rag in the intake to keep dirt out.
There are only two items on the TB, the TPS and IAC. Both come off with a torx.
I doubt the TB needs any service. I'd look at the plugs and maybe wires.
At 500 rpms, A4 tend to occassionaly idle poorly.
Remove lid, MAF, and Maf to TB hose.
Remove the 3 screws holding the TB on.
Remove the 3 hoses attached to TB. I use the TB screws to plug the coolant hoses so they don't leak.
Take the TB off.
Put a clean rag in the intake to keep dirt out.
There are only two items on the TB, the TPS and IAC. Both come off with a torx.
I doubt the TB needs any service. I'd look at the plugs and maybe wires.
At 500 rpms, A4 tend to occassionaly idle poorly.
05-06-2004, 07:45 PM
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How old are your plugs?
Have you done all basic maintenance?
A switch to Iridium plugs will clean up your idle a bit. Using colder plugs than stock will make your idle rough.
Have you done all basic maintenance?
A switch to Iridium plugs will clean up your idle a bit. Using colder plugs than stock will make your idle rough.
05-06-2004, 09:40 PM
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Originally Posted by 93TAWicked1
Throttle position Sensor. At 34000 you might want to change your plugs. They will last ALOT longer than that but performance will take a hit.
HMMM my car idles pretty rough too wonder what my problem is
HMMM my car idles pretty rough too wonder what my problem is
