Fuel cut at high boost.

Discussion in 'General Motoring' started by Boris Mohar, Nov 8, 2003.

  1. Boris Mohar

    Boris Mohar Guest

    Hello,

    With the onset of cooler weather I am starting to experience a sudden cutout at
    high boost.. As soon as I hit 15- 17 lb of boost the engine cuts out and than
    it picks up instantly moments later al lower boost. I am told that 91 B230FT LH
    system does not have a boost cutout and I know that I am not hitting the rev
    limiter so what is cutting the fuel? The reason I suspect the fuel cut is that
    the O2 meter drops instantly to zero from 0.9 Volts where it usually indicates
    the boost enrichment. Could it be that the AF is over ranging and the computer
    decides to cut fuel?



    Regards,

    Boris Mohar

    Got Knock? - see:
    Viatrack Printed Circuit Designs http://www3.sympatico.ca/borism/
    Aurora, Ontario
     
    Boris Mohar, Nov 8, 2003
    #1
  2. Boris Mohar

    Mike F Guest

    The LH 2.4 fuel system had a provision to turn off the fuel pump relay
    based on an airmass/RPM map. With the colder, denser air available
    these days you're getting into this area.
     
    Mike F, Nov 10, 2003
    #2
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