C5 Z06 stumbles when hitting third
11-04-2018, 11:45 AM
#1
Racer
Thread Starter
C5 Z06 stumbles when hitting third
So, if I take it to fuel cut off and shift to third gear, it hits a dead spot or stumbles. What would cause that?
11-07-2018, 12:14 AM
#2
Le Mans Master
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St. Jude Donor '13-'14-'15
Sounds like you are hitting the "safety rev limiter" Which shuts down fueling creating a stuttering sound--A C5 Z06 has a safety rev limiter of about 6600 RPM's So you need to shift it BEFORE 6600 RPM's to avoid hitting the rev limiter----If this is not what's happening then it can be another issue--What RPM are you shifting at ? And in 3rd is it stuttering or just laying doen on throttle response?
11-10-2018, 09:38 AM
#4
Racer
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I had an issue too once with the car breaking up sporadically before redline and after shifting. Turned out I had a loose ground wire on the engine block, which was hard to see with the long tubes. Check all your engine grounds on both sides of the block and behind the driver side head.
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seebobgo (11-10-2018)
11-11-2018, 03:48 PM
#5
Racer
Thread Starter
I had an issue too once with the car breaking up sporadically before redline and after shifting. Turned out I had a loose ground wire on the engine block, which was hard to see with the long tubes. Check all your engine grounds on both sides of the block and behind the driver side head.
11-11-2018, 07:53 PM
#6
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Sounds like MAYBE a glitch in your TPS signal...can’t know for sure unless you put a scope on it...you can try backprobing both TPS signal wires with a DVOM with KOEO and see if the voltage increases then decrease smoothly as the accelerator is pushed down and then released...I did a short video of my ‘01’s TPS signal waveform...I’ll include it here !!
Last edited by C5 Diag; 11-11-2018 at 07:56 PM.
11-13-2018, 03:40 PM
#8
Racer
Thread Starter
Sounds like MAYBE a glitch in your TPS signal...can’t know for sure unless you put a scope on it...you can try backprobing both TPS signal wires with a DVOM with KOEO and see if the voltage increases then decrease smoothly as the accelerator is pushed down and then released...I did a short video of my ‘01’s TPS signal waveform...I’ll include it here !!
https://youtu.be/a00TKvi9cWY
https://youtu.be/a00TKvi9cWY
Turned off traction control and problem solved. I guess the light didn't respond to the split second or I wasn't paying attention. Didn't think it would spin third and I peddled second.
It was putting the brakes on. I feel foolish but not out any coin.
Last edited by seebobgo; 11-13-2018 at 03:44 PM.