ECM fault after heavy throttle? any1 seen this? vid
06-01-2015, 06:46 PM
#2
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have a friend with an ls2 tb to try? TPS sensor is integrated on LS2 tb and cannot be changed out independently to my knowledge.
What happens when you fire up the car?
What happens when you fire up the car?
06-01-2015, 07:03 PM
#3
Launching!
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Car starts and runs fine. If i drive slow and granny shift all is good and no DTC's or reduced power. Just only with a good amount of sustained throttle it will trigger.
I never had this problem prior to getting tuned with this person. and my TB is stock. It was working fine before the tune?!
Unfortunately I don't have another TB to try out.
I never had this problem prior to getting tuned with this person. and my TB is stock. It was working fine before the tune?!
Unfortunately I don't have another TB to try out.
06-01-2015, 10:18 PM
#5
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Had this saved
How to Relearn the ETC (electronic Throttle Control)
If the battery is disconnected, the electronic throttle control (ETC) may forget the zero throttle position too. If you find that your CTS runs poorly, you will have to have the re-learn the position.
To do this, turn the key to the run position with the engine off for atleast three minutes. Then turn the key to the off position. Start the engine and let it idle for 30 seconds. Turn the engine off and restart.
How to Relearn the ETC (electronic Throttle Control)
If the battery is disconnected, the electronic throttle control (ETC) may forget the zero throttle position too. If you find that your CTS runs poorly, you will have to have the re-learn the position.
To do this, turn the key to the run position with the engine off for atleast three minutes. Then turn the key to the off position. Start the engine and let it idle for 30 seconds. Turn the engine off and restart.
06-02-2015, 10:16 AM
#6
Had this saved
How to Relearn the ETC (electronic Throttle Control)
If the battery is disconnected, the electronic throttle control (ETC) may forget the zero throttle position too. If you find that your CTS runs poorly, you will have to have the re-learn the position.
To do this, turn the key to the run position with the engine off for atleast three minutes. Then turn the key to the off position. Start the engine and let it idle for 30 seconds. Turn the engine off and restart.
How to Relearn the ETC (electronic Throttle Control)
If the battery is disconnected, the electronic throttle control (ETC) may forget the zero throttle position too. If you find that your CTS runs poorly, you will have to have the re-learn the position.
To do this, turn the key to the run position with the engine off for atleast three minutes. Then turn the key to the off position. Start the engine and let it idle for 30 seconds. Turn the engine off and restart.
06-02-2015, 07:58 PM
#7
It can only come down to 3 possible causes. First; (and ive had problems here) the tb is junk! Ive been thru 2 ls2 tb's and bought a 3rd brand new from gm and havent had a problem since. All tps related.
2nd; pedal position sensor. Its just a potentiometer and they do develop dead spots in the sweep.
3rd resistance somewhere in the wiring.
Of course it could be the TAC module but unlikely in my experience... Or pcm.. Again ,thats really the last thing to kick the bucket unless its dead shorted
2nd; pedal position sensor. Its just a potentiometer and they do develop dead spots in the sweep.
3rd resistance somewhere in the wiring.
Of course it could be the TAC module but unlikely in my experience... Or pcm.. Again ,thats really the last thing to kick the bucket unless its dead shorted
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06-02-2015, 09:29 PM
#8
Launching!
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I believe the problem is solved. The code was set by a major throttle position mismatch due to an issue with the tune. Specifically the throttle table. The throttle curve was adjusted outside the tolerance band for position error.