Question about Cars & Trucks
I have a 1984 gmc k2500, has a 454 in it and the fuel pump is hitting cross member.
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Posted on Jan 02, 2017
sound like an internal engine problem. either one or more of the pistons has "piston slap" and that knocking will diminish as the engine warms up or possibly a rod bearing is worn out. have a tech do a manual oil pressure test to make sure the oil pump and main bearings are ok. piston slap or knock that decreases when the engine warms up is not that serious, but a rod bearing knock or possible oil pump failure should be taken care of asap.
Posted on Oct 29, 2009
Testimonial: "thanks, after reading what you've described it sounds exactly like the problem I'm having, looks like we'll be going to the shop."
you'll need a professional computer to reset how ever there are two relays for fuel on chevrolet
i would suggest finding the second one first
Posted on Dec 14, 2009
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