Mechanics

CHEVY RUNS ROUGH AND LEAKS FUEL

1997 Chevrolet Tahoe

Engine Mechanical problem
1997 Chevy Tahoe V8 Four Wheel Drive Automatic 114000 miles

We bought a 1997 chevy tahoe lt last year. We have never drove it. We understood that it had engine troubles. So we trailered it home. We finally got a chance to take the engine out and start the overhauling process. We found that the main bearings were bad. We replaced them, all gaskets, pistons, rods, flywheel, spark plugs, wires, fuel filter, oil cooler lines, and a few other small parts. We spent roughly 22 hours replacing the engine and putting it back together. We went to start it and it wouldnt turn over right away. We rechecked a few things with computer and it seemed ok. The engine runs rough and it sputters, we checked the fuel pump it seems to be good. My husband noticed that the oil was thinned and smelled like fuel while he was checking everything over. He says the fuel is running into the cylinders. What would cause this? Could this be the reason the bearings went bad and we had to overhaul?
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Kar79_boom
February 9, 2009.




Sounds like you have a fuel injector or pressure regulator leak. The fuel injectors and pressure regulator assembly is located under the upper intake manifold (the plastic thing). This is the only way that enough fuel can get in the oil to cause thinning and for you to be able to smell.
What is the fuel pressure?
And YES, this will cause the bearings to fail if not caught in time.

Tiny
Pear69
Feb 15, 2009.


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