1995 Toyota Corolla Fuel Pump Problem

1995 TOYOTA COROLLA
150,000 MILES • 4 CYL • FWD • AUTOMATIC
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GAJ
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  • 1 POST
Our Corolla will occasionally not start after running great. If you unplug the wiring harness from the fuel pump and reconnect, it will start up perfectly. It may runs for weeks or months and start ever time and without warning we get in and it won't start. Each time we just unplug the fuel pump and reconnect and things are good. The car has never just stopped it only won't start on occasion. I can't figure out why unplugging the pump makes a difference. Any idea on what is going on?
Nov 30, 2008 at 11:31 AM
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MHPAUTOS
  • ✓Experienced Mechanic
  • 31,937 POSTS
Hi there,

you may have a problem with the pin connectors at that plug, rather than unplugging it next time just try wiggling it and pushing it in to seat it, has the small rubber seal in the plug been lost, i feel that it should have one and that keep the plug from moving about

mark (mhpautos)
Nov 30, 2008 at 11:38 AM
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GAJ
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Thanks for the suggestion. I have tried to move the plug around while the engine was running just to see if I could get the pump to stop, but was unsuccessful. If the plug wasn't making good contact, I wonder why the car has never stopped while running...only not start up after being turned off. I have even bench tested the 2 relays associated with the fuel pump and they tested okay. I think it's something simple, but not sure where to start looking.
Dec 1, 2008 at 10:56 AM
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MHPAUTOS
  • ✓Experienced Mechanic
  • 31,937 POSTS
HI there,

I would consider replacing the pump if it is over 5 years old.

Mark (mhpautos)
Dec 1, 2008 at 12:53 PM
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