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Showing results for tags 'fuel pressure drops'.
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So for the past few weeks my fuel pressure has dropped from 19 psi at idle and 17 psi cruising, down to 16 psi at idle and 14 psi cruising. I have checked all my hoses and they look good, put a clamp on one hose that may have had an issue. If I park the truck facing down hill it will start after a week of setting no problem, but if the truck sits level or facing up hill then it takes a long time cranking to start. If I bump the starter and let the fuel pump cycle then it will usually start quickly. I have notice that as the tank gets lower it seems that the fuel pressure drops one or two psi. Other than starting over with a new fuel pump and big line kit, I am not sure. I have read about Raptor pumps going bad, so not sure if this is the issue or not. Another thing I have noticed is once in a while when I bump the starter the fuel pump does not come on? I replaced the relay under the hood, but it still seems to be just an occasional thing. Wondering if there could be an electrical issue instead of a fuel issue?
