Question about 1995 Chevrolet K2500

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1995 k2500 Chevy truck engine runs rough some of the time?

I have a 1995 k2500 Chevy truck with a 350 engine and a auto. trans. with 130,000 miles. I bought the truck three years ago for the farm and it only sees around 2000 miles per year. My problem started last year with it running very rough (not able to accelerate with an occasional back fire) after it warmed up. At a certified mechanics advice he changed the plugs, wires, distrib. cap and rotor button. All this to no avail. The problem comes and goes always clearing itself and never has it left me stranded. A second mechanic checked it out and changed the fuel filter saying it was plugged he checked the fuel pressure and said it was normal. This seemed to resolve the issue until about two months ago when the problem returned after driving the truck for over an hour and a half on the interstate at 65 mph. I stopped at a Napa store, replaced the filter thinking that was the problem and got back on the road. Less than 5 miles later it was acting up again. If I would pull over and sit for 5 minutes (engine running) I could go for 1 to 10 miles before it acted up again. If I just stayed on the road with it running rough I could not get much over 40 mph. After the truck had been turned off for less than one hour, I headed back onto the interstate for a two and one half hour trip at 65 mph and the truck ran like a champ! Since the long trip it has acted up twice on less than 15 mile outings. I am totally baffled as to the problem. I can't get it to run rough every time I drive it and I can't afford to pay a mechanic to hop in it and drive it until it happens again. Any help with this frustrating problem would be greatly appreciated.

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I had a similar problem @105k. I had changed the fuel filter but it was still sending all kinds of codes that were related to 2 problems. Long story short, the main problem was a bad trigger assembly in the distributor (rough running) and the other was a loose engine to body ground (engine code issue). Good luck, this worked for me, now 171k.

Posted on Aug 11, 2010

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