Clutch1819
I'm Awesome
Seem to have a problem I can't figure out. My truck is a 98 Sierra. 5.7. If I'm going 55mph uphill and the trans downshifts and stays in that gear for a few, it will start missing. Feels like it's only 1 cylinder. Also does this if I pass someone. Pretty much anytime the engine is under heavy load. I've replaced the fuel filter, spider assembly, distributor, wires, plugs, and the coil. Anybody have an idea what could be causing this? I also tested fuel pressure and it's in spec.