grrrr!!!

I have a 99chevy sub and when I'm driving at sixty mph my truck starts missing. What I mean is it chugs and hesitates like it wants to quit. Any help would be greatly. Appreciated . I've. Spent over 1500 dollars. Trying to fix this problem at the shop to no avail.

Please tell us what has been replaced, what brands were used, what testing was done.

Also any and all DTC's (codes).

Replaced fuelpump.dist.masairsens. throttlepos sens. Battery alt.

What is the fuel pressure when this happens? Anything below 55-60 is not good.

You didn't mention anything about the filter being changed.

Also what motor?

Check for a fowled plug...Twas my problem.


Could be the spider and a poppet valve stuck


Any codes?



Edit: Annoying, ain't it?

replace rotor, cap, plug wires.........

Stop throwing parts at it. Get it professionally diagnosed.