Engine Performance problem
1995 Chevy Truck V8 Four Wheel Drive Manual 184000 miles
This is a 1995 1 ton dually, 4wd, manual with a 454.
I'm baffled because this has been going on for about a month. The day it started I was driving a gravel road at about 45mph. Everything sounded fine and it just quit. Like I had turned the key off. I coasted to a stop. It would crank and crank but no fire. I did find a wire to the oil sending unit was melted to the exhaust manifold which shorted it out and caused it to quit. So I replaced the bad section. It fired up but runs like crap. It won't idle. You have to keep your foot in it to keep it running. It has 0 power.
I've replaced the fuel filter, fuel pump, fuel pump relay, spark plugs, spark plug wires, cap, rotor, ignition module, ecm, egr valve, map sensor, pulled vacuum lines apart and put a blower to them. I've ran a compression check and everything is at 125psi.
I did find a leak in the driver side middle section of the intake manifold. So I pulled the manifold inspected it with a straight edge for warpage or cracks. It appeared good. So I reinstalled with new gaskets. Once reinstalled it still run the same. I sprayed intake cleaner all around the intake and throttle body and didn't hear any change in the engine.
It will idle at about 1700 rpm when I unplug the map sensor but still has 0 power.
have the same problem?
Monday, September 13th, 2010 AT 4:20 PM