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2003 chevy trailblazer_lt_ext
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confusedsoul has reported a post.

Reason:
Move to OEM issues please.
Post: Pulling my hair out!
Forum: 02-08 Vortec 4.2L I-6 Engine and Drivetrain
Assigned Moderators: N/A

Posted by: confusedsoul
Original Content:
Ok guys the TB is acting up and I'm not sure what it is at this point. It FEELS like hesitation/miss/jerk.
No codes (at least thrown codes), no lights, nada.
It happens in park and when driving (I believe even during acceleration though not near as noticeable/often). Fiance claims it didn't happen when in 3rd gear but would in D. Load difference on engine or a transmission problem? I don't know. I can tell you I can watch the rpms drop on the tach when it does it.

The only thing I have done is cleaned the TB (by removing it) and having the battery disconnected while doing so for 30 minutes or more. There are 68,000miles on it I do believe.

So is it transmission related or bad coil/plug issue?
 
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