Most of the time it runs perfect, but every so often it starts missing like crazy. I can bairly get it in the driveway. I have replaced plugs, plug wires, cap, button, and coil. I even tried a different ecu.

I have popped the hood at night but i can't see anything arking.

Any advice will be greatly appreciated...

Thanks,
Lefty

 

possibly a MAF sensor

 

Is there any way to test this? I was also told it might be the crank position sensor. Any ideas????

 

Sounds like the fuel pump.

 

These trucks don't have a MAF sensor, only a MAP sensor. See the Glossary Sticky if you don't know the difference.

To the OP, almost everyone coming in here has a problem. Please use more descriptive thread titles.

 

How about a fuel filter? could that be the cause. I have looked under the truck but can't locate it.

I was thinking crank position sencer because when it starts missing it sounds very much like it's out of time.

 

The fuel filter is part of the fuel pump assembly.

 

are you sure its like a missfire sound/feel (probably dumb question) but i was thinking maybe the CAT might be clogged

 

Can I buy a fuel pump assembly at a parts store or is it a dealer only item?

 

CAT had been gutted for years. Its diffinately a misfire. I start getting codes, cylinder 1 misfire, cylinder 6 misfire, cylinder 8 misfire, cylinder 2 misfire. Then all of the sudden it just straitens up and runs good for a while. When it starts acting up it is diffinately like it is out of time. It will pop through the throttle body.

I guess i'm going to replace the crank position sencor first and it that doesn't do it i'll move on to the fuel pump.