Low idle in gear, vibrates like crazy
12-19-2011, 08:53 PM
#1
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Low idle in gear, vibrates like crazy 99 Z28, A4
In gear, warmed up or cold, idle drops down to 500 and the car really starts to resonate and vibrate obnoxiously.
In neutral/park it goes away and idles at ~600-650
As soon as I take my foot off the brake and give it any gas, it goes away.
Got the car bone stock, I think it did it then as well, but now its definitely more noticeable. 114XXX miles.
I've done:
Plugs (NGK-TR55)
Wires (MSD)
Lid
Ported and cleaned my TB (don't think I fucked up any sensors)
LTs
ORY
SLP 2OTL
Deleted AIR/EGR
So of course it has codes still, I'll try to get them pulled tomorrow to see if that leads me anywhere.
Until then, any ideas?
In gear, warmed up or cold, idle drops down to 500 and the car really starts to resonate and vibrate obnoxiously.
In neutral/park it goes away and idles at ~600-650
As soon as I take my foot off the brake and give it any gas, it goes away.
Got the car bone stock, I think it did it then as well, but now its definitely more noticeable. 114XXX miles.
I've done:
Plugs (NGK-TR55)
Wires (MSD)
Lid
Ported and cleaned my TB (don't think I fucked up any sensors)
LTs
ORY
SLP 2OTL
Deleted AIR/EGR
So of course it has codes still, I'll try to get them pulled tomorrow to see if that leads me anywhere.
Until then, any ideas?
12-20-2011, 02:40 PM
#4
The tell-tale sign is that it goes away when you shift in to neutral, breaking the connection between the torque converter and rear wheels.
Another thing to try is to keep the car in gear and take your foot off the brake. The car should "walk" forward at a faster pace than normal for an automatic car if the torque converter is sticking.
Another thing to try is to keep the car in gear and take your foot off the brake. The car should "walk" forward at a faster pace than normal for an automatic car if the torque converter is sticking.
12-21-2011, 01:56 PM
#5
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Haven't noticed that yet, I may try today to see.
The only other symptom I could see for the converter would be in OD at 40-45mph it seems a little "looser" than it should, a bit of play.
Not a lot, but I started to notice it.
Not necessarily a "slip" either.
The only other symptom I could see for the converter would be in OD at 40-45mph it seems a little "looser" than it should, a bit of play.
Not a lot, but I started to notice it.
Not necessarily a "slip" either.
