Question about 2001 Chevrolet Monte Carlo

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2001 monte carlo SS 3800 motor,turn over but won't fire

Fuel pump is working,I have changed the fuel pressure regulator,but as I do a fuel pressure test I still only get a reading of 42 PSI and the pressure will drop as I watch the guage, Manual calls for 53-59 PSI,I just got done reading in the repair manual that a faulty oil pressure switch will act as a fuel pressure cut off switch,the vehicle has 65 thousand miles on it and is driven very very little,probably once or twice in 6 months and only about 5 miles or less,the problem started when my mom had a neighbor charge a low battery,as the vehicle wouldn't turn over,she drove it a couple of miles and parked it and it has not started since

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  • bp20 Mar 12, 2009

    I have two trouble codes that come up PO230- fuel pump primary circuit malfunction and P1189-oil pressure switch circuit malfunction. I am thinking that possibily the oil pressure switch is faulty which according to the repair manual will also act as a fuel pressure cut-off device. any thoughts? anyone? thanks, I'll be waiting for an answer or suggestion

  • mike loshbough
    mike loshbough May 11, 2010

    is the security light flashing also the switch could be the cause

  • yadayada
    yadayada May 11, 2010

    what if any trouble codes do u have, the pressure dropping indicates the fuel pump is defective.



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There is a possibility that the battery is bad and not making the fuel pump work properly or to it's right pressure. Cna you hear the fuel pump come on when you turn the ignition switch to the on position... Have someone unscrew the fuel cap and listen near the hole you put fuel in to see if they hear a humming or vibrating sound when you turn the key to the on position.... If you hear the fuel pump come on Check the battery... It might have good voltage but the amps might be week... It could be the battery...

Posted on Apr 22, 2009


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