C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Bog on acceleration from stop

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Old Feb 28, 2026 | 06:48 PM
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Default Bog on acceleration from stop

I guess that is what you would call it.

Car at a full stop, I press gas pedal

RPM goes up as normal

Acceleration lags behind until perhaps 13 mph when it is at about 4k RPM. Then the RPM drops to match the speed appropriately and it runs as normal until I shift.

It does it in 2nd but less pronounced.

I am not sure where I should go in the service manual. For some reason TPS seems like the culprit.

Let me know if you have tips or direct me to where to go in the service manual. I do know the procedure for testing a TPS and will try it.

94 6spd


Last edited by Soundwave; Feb 28, 2026 at 06:49 PM. Reason: add vehicle
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Old Mar 1, 2026 | 09:05 AM
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Originally Posted by Soundwave
I guess that is what you would call it.

Car at a full stop, I press gas pedal

RPM goes up as normal

Acceleration lags behind until perhaps 13 mph when it is at about 4k RPM. Then the RPM drops to match the speed appropriately and it runs as normal until I shift.

It does it in 2nd but less pronounced.

94 6spd
You're car has a 6 speed manual transmission. From your description, it sounds like your clutch is slipping.

If your clutch wasn't slipping, engine RPM would be directly correlated to vehicle speed and acceleration. There's no way around that.
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Old Mar 1, 2026 | 10:45 AM
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thanks

I performed a few tests related to clutch I found on AI. It failed them all.

I saw a thread recently debating the ins and outs of specific clutches. I'll try to find it, but I am open to suggestions.
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Old Mar 1, 2026 | 11:09 AM
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id just buy a friction disk and retain all other clutch component’s edit: IF its diagnosed as a slipping clutch!
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Old Mar 1, 2026 | 12:40 PM
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Originally Posted by VikingTrad3r
id just buy a friction disk and retain all other clutch component’s edit: IF its diagnosed as a slipping clutch!
Thanks. I have a call into Bill (ZF Doc) to see what he can tell me.

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