TPS question??
TPS question?? After several tuning attempts by some well known tuners, my head and cam LS6 FAST LSXr102 with 90mm TB continues to have intermittent issues. The car will run fine and then all of a sudden it will surge at idle, stall (fall straight down) when pushing in the clutch at cruising speed. It sometimes surges big time on start up. Since these issues are not always repeatable all the time we're beginning to feel we have a bad TB. The car has been tuned by Vector, Modern Muscle and Speed Lab. At first it was just driveability issues at low speed. Meyers at Modern Muscle did a great job solving those low speed issues, but then we had so much non repeatable stalling and surging at regular speeds, he's thinking we have a problem that's not software related. I thought if the TPS sensor was bad it would throw a code. We get no codes. Any second guesses out there when tuning is not working? I'm ready to go to a Nick Williams 102.
Last edited by Big Bu Bu; Sep 26, 2010 at 08:34 AM.
Teching In
Joined: Jul 2010
Posts: 6
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After several tuning attempts by some well known tuners, my head and cam LS6 FAST LSXr102 with 90mm TB continues to have intermittent issues. The car will run fine and then all of a sudden it will surge at idle, stall (fall straight down) when pushing in the clutch at cruising speed. It sometimes surges big time on start up. Since these issues are not always repeatable all the time we're beginning to feel we have a bad TB. The car has been tuned by Vector, Modern Muscle and Speed Lab. At first it was just driveability issues at low speed. Meyers at Modern Muscle did a great job solving those low speed issues, but then we had so much non repeatable stalling and surging at regular speeds, he's thinking we have a problem that's not software related. I thought if the TPS sensor was bad it would throw a code. We get no codes. Any second guesses out there when tuning is not working? I'm ready to go to a Nick Williams 102.
11 Second Club
Joined: Oct 2006
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These days, the first rule is to scan the vehicle while the problem is occuring & use this info to diagnose the faulty part. If you have no access to a scanner, I would try borrow a known good part before ponying up for a new one.
