if you are revving the engine to 2000-3000 rpm in neutral, then there is no load on the engine and it is using very little fuel... certainly no where near what it would need in gear under load. So you definitely have a fuel delivery problem. In neutral you should be able to bounce it off the rev limiter (or float valves) and your fuel pressure should not change.
But under load at w.o.t. it's not uncommon to only have 1-2 psi of fuel pressure at the carb when there had been 6-10psi at idle.
what kind of fuel pump are you running? Do you have an electrical one in the tank or on the frame rail, or is it a mechanical fuel pump mounted on the engine?
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2002 SS |