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mooney265 mooney265 is offline
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Join Date: Sep 2008
Location: New Orleans
Posts: 1,365
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Sounds like you Control Pressure is too high... It should be around 2 BAR when cold and 3.5 BAR when warm. It's controlled by the WUR.

If you have a CIS pressure gauge set, you need to verify your fuel pressures.

Remember, that the system pressure should be about 6-6.5 BAR [if you have 2 pumps].

** What's holding that "see-saw" down is the Control Pressure [CP]. On one side, you have vacuum pulling it down and on the other side is the CP pushing against the vacuum. It the CP is too high, then the vacuum will not be enough to pull the metering plate down.

Good luck...
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LIVN80S - - Red '79 Porsche 930 Steel Slant Nose Conversion [in 1987] w. 46k miles 3.3L; 964 Cams; K27HF @ 1.0 BAR, with Garrettson Intercooler; Rarly Zork; CIS Flowtech Fuel Head & BL-WUR.
Old 04-09-2010, 10:49 AM
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