A4 owners question
Safety Car
Joined: Oct 2000
Posts: 4,949
Likes: 10
From: Monticello MN
Way too high. Is that with A/C on or off? A/C on kicks the idle a little higher, I believe, but not that high. Also, makes me wonder if the throttle body is sticking a little. Hard to believe the computer would change by itself.Ed
Drifting
Joined: Mar 2010
Posts: 1,628
Likes: 15
From: Seattle WA
With a 2.73 axle ratio, at 750 RPM, assuming zero slip of the torque converter (which is not realistic), your speed on stock tires and wheels is 7 MPH. Adding in the slip, you shouldn't be above 5. With a 3.15 ratio, you're down to 6 MPH w/ no slip.
3rd gear at 750 RPM is 22 MPH. There's no way you're in 3rd gear after coming to a stop.
Something is wrong with this picture, mathematically speaking.
3rd gear at 750 RPM is 22 MPH. There's no way you're in 3rd gear after coming to a stop.
Something is wrong with this picture, mathematically speaking.
Safety Car
Joined: Oct 2000
Posts: 4,949
Likes: 10
From: Monticello MN
Pro
Joined: Dec 2007
Posts: 663
Likes: 0
From: Show me lower taxes Missouri
Will fine tune the idle when I do my high speed tuning.
Thread Starter
Racer
Joined: Mar 2010
Posts: 252
Likes: 0
From: Clarkesville GA
Oldtimer
I checked the TB an found "some" black gunk inside which I cleaned out. Everything else looked OK.
Idle dropped to 700rpm in drive with A/C on.
I will watch it real close an see if idle speed continues to go up before I go the shop routine.
Idle dropped to 700rpm in drive with A/C on.
I will watch it real close an see if idle speed continues to go up before I go the shop routine.
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Safety Car
Joined: Oct 2000
Posts: 4,949
Likes: 10
From: Monticello MN
Melting Slicks
Joined: Apr 2007
Posts: 2,916
Likes: 1
From: West Palm Beach Florida
I am at about 625 in gear, stopped
.
Le Mans Master
Joined: May 2006
Posts: 6,774
Likes: 363
From: Midland TX
Thread Starter
Racer
Joined: Mar 2010
Posts: 252
Likes: 0
From: Clarkesville GA
Oldtimer
OK my earlier tests after cleaning the TB were done in the garage.
I just took it out on the road and everything seems to be OK for now.
Idle speed is around 600/625, A/C on, in Drive
Idle speed forward is around 6-8 mph.
Even though I could not feel anything inside the TB it must have been something holding it open just a small amount.
Thanks for all of the input/help
Julian
I just took it out on the road and everything seems to be OK for now.
Idle speed is around 600/625, A/C on, in Drive
Idle speed forward is around 6-8 mph.
Even though I could not feel anything inside the TB it must have been something holding it open just a small amount.
Thanks for all of the input/help
Julian
Race Director
Joined: Jul 2007
Posts: 18,681
Likes: 47
From: Reno is so close to Hell you can see Sparks , State Of Confusion
St. Jude Donor '12-'13-'14
I would say maybe mine will get to 5mph on level ground. I have to apply next to nothing to keep the car still. If you think yours will go 25 I would have to say that is not normal at all.
Melting Slicks
Joined: Aug 2003
Posts: 2,786
Likes: 7
From: Iowa
nothing to do with my vette but I've found a great variance in the creep on automatics. I had a 96 taurus which would end up going so fast with just letting off the brake that the tranny would shift into 2nd without ever touching the throttle. I currently also have a 97 SHO which as been modified with a tune and some other things but it has nowhere near the automatic pull when it gear with no throttle. I never knew what to make of that.