'96 Roadmaster starting issue.

Discussion in 'Other' started by wildcatsrule, Feb 16, 2019.

  1. wildcatsrule

    wildcatsrule Well-Known Member

    The '96 has been in storage for a couple years. It won't start. If starting fluid is sprayed into the intake, it will start, but won't stay running. A new fuel system pressure regulator has been ordered and if that doesn't work, a new fuel pump is the next part to replace. Anything else I should be looking for as the culprit?
     
  2. Electra man

    Electra man Older and Slower

    Was it stored with the fuel system dry? If there's old dead gas in it then it won't ever start. If so drop and flush the tank replace the pump, fuel filter and add fresh gas. The regulator may be fine or dried out no way to tell until all else is done. Turn the key to run and listen for the fuel pump without cranking. If you hear nothing it's bad or if it doesn't stop pumping when pressure is reached it's bad.
    Any of the sensors could be bad or rodent damage to the wiring. Does it throw any codes/check engine light? An OBD II code reader would be real handy trying to tackle this.
    Btw when you use the starting spray are you putting the air intake hose back on the throttle body before starting? The engine won't continue to run without air being pulled through the air intake sensors.
     
  3. '72 Skylark Custom 4bbl

    '72 Skylark Custom 4bbl Well-Known Member

    It's been a little while since i got rid of my LT1 Caprice, I had a 94 & it had a Schrader valve up near the firewall where if you have a pressure tester you can test the fuel pressure to see if you're within specs for the fuel pump.

    I've also had a few issues with the ignition coil. On the Caprice it was mounted on the drivers side front. Cheap to replace but I also fixed an intermittent running problem by fixing up the ground wires that go to the same coil. Also make sure the MAF/plug sensor is working & clean.

    Kyle
     
  4. wildcatsrule

    wildcatsrule Well-Known Member

    There is no rodent damage the car was stored with a full tank. Will have to try the listening for the fuel pump idea.
    I'll have to check again, but I think there was an intermittent check engine light issue before the car was stored. Yes, the air intake hose was put back in place.
    May have to borrow a pressure tester and/or code reader to figure it out. Thanks for the suggestions.
     
  5. BQUICK

    BQUICK Well-Known Member

    Some times all it takes is banging/slapping on the tank to wake the pump up. Do that with someone cranking the motor.
    Also, sometimes the pump fuse will blow if the pump motor doesn't turn. Replace fuse and do above.
     
    Footbag likes this.
  6. pbr400

    pbr400 68GS400

    If the pump doesn’t hum it may be a bad relay or switch. It should have a test lead or jumper near the booster-run 12v to it and see if the pump runs. If you have the pump running you can put a guage on the shrader valve to verify pressure.
    Patrick
     
  7. wildcatsrule

    wildcatsrule Well-Known Member

    Changed the fuel filter and fuel pump and it started right up!
     
  8. '72 Skylark Custom 4bbl

    '72 Skylark Custom 4bbl Well-Known Member

    Great news!

    Pumps are a pain to change but the filter is easy at least.

    Kyle
     
  9. My3Buicks

    My3Buicks Buick Guru

    The pumps in the Roadmasters are not an uncommon issue
     

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