I am need of some help guys. Lately my truck has been acting weird. The engine seems to stumble or act as if it is out of gas around 30-60mph at steady throttle. It's fine when you ease or give it a little more throttle. Also at WOT the engine sometimes pauses slightly then starts to pull hard again. My boost on my supercharger stays consistent and I have been using the same type gas I have always been using from the same store. This has been going on for about 3000 miles.
I have changed my fuel filter and cleaned my air filter recently. I also have reset my computer. Do you think it could be my fuel pump? Thanks for any ideas.


98 Nascar Edition

homepage http://www.freeyellow.com/members8/jackhel/index.html

POWERDYNE SUPERCHARGER, SUPERCHIP, AUTOMETER BOOST GAUGE AND POD, K&N FILTER, TRANSGO PERFORMANCE SHIFT KIT, DYNOMAX ULTRA FLOW EXHAUST, GUTTED MAF, 4.10 REAR END GEARS, XTRA BRITE HALOGEN LITES, AMSOIL Series 2000 Synthetic Motor Oil , 2 inch lowering shackles, G-Tech Pro Series II, AND SOME OTHER STUFF I CAN'T REMEMBER

 

I had a similar problem years ago on a car, the problem there was a bad plug wire. This may not be the case here but I thought that I'd throw out the idea.

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1997 F150 black Flareside, 4.6L, 5 speed manual

 

I think Earnhardt is on the right track. It sounds like an ignition problem, plugs or plug wires.