Todd is right, liquid filed gauges can be inaccurate due to heat or altitude change. Some gauges have a vent screw on top. Make sure not to let any of the liquid out. Now, turn the screw two or so turns out to equalize inside gauge pressure(NOTE.. some gauges have a little rubber plug that you maybe able to remove insted of a screw).
This will allow the gauge to release un-wanted pressure and self adj to different altitudes or temperature. I used to have to do this at different race tracks with my gauges. Oil filled is good for vibration but can suck for accurate readings.
Ron Sutton is also right, It could be your regulator. I have had the diagram ones lose pressure and you have to adjust accordingly. You said you replaced the fuel pump so I doubt its the bypass (if any) in your pump.Some pumps have an adj pressure screw..is that set right?
Another thing... are your hoses old? Maybe they are coming apart inside and tiny bits of rubber are in your regulater. This is just my 2 cents..Hope you find it
Also..For safety sake... I do not like to run a fuel pressure gauge under my hood they can leak JMOHO
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If it ain't buckin, chirpin & makin all kinds of bad noises, then I ain't happy
Accelerating is optional...........stopping is mandatory. Your car WILL stop one way or another.
Last edited by intocarss; 05-29-2013 at 11:04 PM.
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