I have an 01 trailblazer. 0-half throttle it runs perfect. Half-full throttle it boggs to almost stalling.

- Carb/jets are clear
- Air filter on or off same result

my friend thinks its electrical. There are some sensors for the throttle, reverse and low oil.

Anyone heard of this issue?

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you checked main jet and needle jet?

 

Yep all jets are clear. Compression is 120, airbox is solid. Thoughts on electrical?

 

Its probably the spark plug ... change it out and make sure its gaped right

 

try like "onebad" said and clean the carbroter

 

I'm at sea level. What should the main jet be? Someone toldme to try a 110. I dont know what stock is. There is a 130 (if I recall correct) in it now. Also, what is the correct needle position?

thanks

 

Stock main jet is 130. unplug your reverse limiter i bet that will clear things up it happened to me i thought it was the jetting the whole time and it turned out the reverse limiter got water in it and it would bog in forward after going past a certain rpm.

 

thanks I'll keep that mind. I just got off the phone with my mechanic. He claims the issue is fixed. He stuck a 110 in it and now its solid.

thanks for all the replies!

 

stock mainjet is 130 i wouldnt go down to a 110 or youll be running lean and you will just run into worse problems and probably end up having to rebuild the top end.

 

wat state we talking here?