97 jimmy with a 4.3 problems.
I wish I had good news to report but I don't 
I would think it would be a collapsing fuel line if it did it all of the time. But if you start it up it runs perfect for 10 min or so. And after 10 min if you go to pass someone it will just fall on its face. But if you do not give it more than 1/4 throttle when it is messing up then it is fine. Also fuel psi is right at 55psi
Gave that a shot. did not fix the problem
That is a good idea. We have not given that a shot yet
No we did not give it a new pick up or anything when we replaced a new fuel pump. Also after we put a new fuel pump in it ran good for a month until it started doing this. Also it will do it with any amount of fuel in the tank.
Today we took the cat off just to see if it was clogged and it also did not fix it.Also replaced the coil and the coil driver.

How many mile are on your motor? Sounds like you are having a similar problem to what I had to go through with my 96 Blazer. I had to replace my EGR valve because it wouldnt hold an idle, I had to pop in neutral and rev the engine above idle RPMs.
Try the EGR valve. If it doesnt fix it, it needed replacing anyway.
Try the EGR valve. If it doesnt fix it, it needed replacing anyway.
Today we took the cat off just to see if it was clogged and it also did not fix it.Also replaced the coil and the coil driver.
Last edited by UrGrlGveMeDkBrn; Sep 26, 2008 at 06:48 AM.

We also pulled that just to see if it cracked a tooth or something and looked great.
sounds to me like the motor is getting up to temp. and it is retarding the timing.
also if you have a temp gun check the temp. befor, on , and after the cat('s). that will rule out the converter theory.
also try driving it with the the fuel gauge hooked up and see if the pressure drops when it happens.
also if you have a temp gun check the temp. befor, on , and after the cat('s). that will rule out the converter theory.
also try driving it with the the fuel gauge hooked up and see if the pressure drops when it happens.
Yea I kind of hijacked a guys tread that was having the same problem.
His was a coil went bad.I went out and replaced it and did not fix it.







