Car Accelerates by itself
02-27-2014, 11:16 AM
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Car Accelerates by itself Hello all,
I have a 01 TA with a 383 ls1 and an A4. Engine has a 230/234(spinmonster) camshaft, ls6 intake, stock TB, headers, TSP ls6 heads. 3600 stall.
Car has been professionally tuned and runs great, pulls hard, great idle etc. However....When the car is in drive or reverse and I take my foot off the brake and it starts roll, the idle picks up and the car accelerates by itself. Not a great deal but enough to make it a nucence when backing out, parking lots etc. Car will eventually get up to 10-15 mph by itself on a flat stretch.
I have HP tuners, not an expert though, but willing to try things.
Any suggestions??
Thanks in advance!
I have a 01 TA with a 383 ls1 and an A4. Engine has a 230/234(spinmonster) camshaft, ls6 intake, stock TB, headers, TSP ls6 heads. 3600 stall.
Car has been professionally tuned and runs great, pulls hard, great idle etc. However....When the car is in drive or reverse and I take my foot off the brake and it starts roll, the idle picks up and the car accelerates by itself. Not a great deal but enough to make it a nucence when backing out, parking lots etc. Car will eventually get up to 10-15 mph by itself on a flat stretch.
I have HP tuners, not an expert though, but willing to try things.
Any suggestions??
Thanks in advance!
Last edited by pcruiser73; 06-12-2014 at 08:53 AM.
02-27-2014, 11:43 AM
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What you have is standard auto trans "creep", with
a Throttle Cracker airflow adder that opens up when your
road speed goes above zero. The cracker table is not
very clean as-stock, gives excessive air and has some
kooky "divots" that can make return-to-idle kind of
unpredictable / unstable / under/overshoot-prone.
a Throttle Cracker airflow adder that opens up when your
road speed goes above zero. The cracker table is not
very clean as-stock, gives excessive air and has some
kooky "divots" that can make return-to-idle kind of
unpredictable / unstable / under/overshoot-prone.
06-12-2014, 08:57 AM
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still a problem I have played with the throttle cracker tables and have the cruise control issues mostly solved. However the issue of the idle raising up when i take my foot of the brake from a stop is still there. it will also surge if i brake until the car it at a complete stop then idles fine again.
Any more suggestions? could it be the timing tables???
Any more suggestions? could it be the timing tables???
06-18-2014, 08:27 AM
#7
Zero out the throttle cracker table at the 1000 rpm column from 0 to 12 mph. also set the enable speed at 10 and disable speed at 9
If your VE and MAF are tuned within 1-2% with a WB O2 and your idle air is tuned, then the above will fix the problem.
If your VE and MAF are tuned within 1-2% with a WB O2 and your idle air is tuned, then the above will fix the problem.