SOURCE: trouble with my 2006 chevy silverado 3500 duramax diesel
I had the same problem it turned out to be the injector pump witch gm covered it.
SOURCE: 2000 Chevy Venture Fuel Pressure Regulator
Locate your fuel pump fuse in the under-hood electrical center. Start the van ( cold engine ) and remove the fuse. When the engine stalls, the fuel pressure will have been depleted in the rail. You will have a small amount of residual fuel in the line but no pressure. Place a rag under the regulator to catch the dripping fuel.
SOURCE: fuel pressure regulator
Two places to look...if you have separate injectors for each cylinder then regulator should be at the front end of the fuel rail. If you have throttle body injection it is on the throttle body itself.
SOURCE: Chevy 3500 Express truck. fuel problem?
IF YOU GOT CYLINDER MISFIRE.OR OPEN FUEL INJECTOR.THAT WILL CAUSE THE PCM TO ENRICHEN FUEL MIXTURE.TO ADJUST TO DEAD CYLINDER.WHICH ACT AS A LARGE VACUUM LEAK.THATS WHY YOUR EXHAUST TAIL PIPES HAS A RAW FUEL SMELL AND WHITE SMOKES.
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