Quote:
Originally Posted by J-440
Ok, it's reading 14.2 at the alternator and 13.9 at the battery in the trunk. I just bought another 4 gauge wire and ran it from the alt to the starter. The ground strap is a flat, metal 4 gauge with a clean ground to the frame. With the car idling at 800rpm and everything on, my laptop says 10.2 and my fuel pressure gauge is still fluctuating.
Should I get a regular 4 gauge round wire for the alt ground? Also, would it be better to run that red 4 gauge wire from the alternator straight to the battery in the trunk? Thanks again.
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How does the car RUN??
Could this simply be a fueling issue versus a voltage/amp issue? I.e., could your pump be cavating?
Does your system use a return line? Could it possibly aerating the fuel?
Is the feed side to the pump above the pump? Thus a "flooded head".
What size are the lines you're using?
Is there a pre-filter on the pump? Is it clean and obstruction free?
What size is the pickup tube in the tank? Does it have a filter? Is it clean?
Of course all of this only matters is the car isn't running well...... if it runs fine -- then are you just chasing a voltage drop you're seeing on the Computer -- or chasing a surging fuel pressure gauge reading??