Fuel pressure testing........BBi

Discussion in 'Technical Q&A' started by henryk, Apr 3, 2004.

  1. henryk

    henryk Formula Junior

    Dec 9, 2003
    Door County, WI
    My car doesn't want to start from cold. I pressure tested one side, so far, and the results are a follows:

    Primary pressure = 5.5 bar

    Cold WUR pressure = 0.6 bar. Ambient temp was 39 deg F.

    Warm WUR pressure = 2.8 bar. Producing vacuum in the small hose, coming from the base of the WUR rose the pressure to 3.5 bar. Vacuum in the larger hose, coming off the top of the WUR lowered the pressure.

    Turning the pump off, from primary pressure = 3.2 and steady for 10+ minutes.

    Is the cold WUR pressure too low? Would this cause a cold non-start?

    Any thoughts?

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