Question about 2002 Daewoo Lanos

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Fuel Reg........ I'm stumped. Car starts, runs great, dies when I make a left turn. Seems to starve for fuel. Right turns are fine. Should fuel system maintain fuel pressure even after car sitting for a while? I checked pressure at fuel rail service port. sometimes it is pressurized, other times nothing, is that normal, and what are the symptoms of a failing fuel regulator? Replaced fuel pump motor recently but wondering if I might have an internal leak within the fuel pump module, which might be the cause of pressure loss?

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Fuel pressure should not drop more than 5 PSI in 24 hours, the symptom you have is more than one issue, first verify the system holds fuel pressure over night, the pressure regulator will not cause this issue, the check valve built into the fuel pump will. On to the dieing concern, clean the idle speed control air bypass valve and the throttle valve with throttle body cleaner spray with the engine running at high idle, spray in at least 1/2 can of the cleaner, next disconnect the battery for 5 minutes, then drive for 2 days under varying conditions to "relearn the idle strategy".

Posted on Aug 26, 2008

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Engine cranks fine, but will only run 5-6 sec then dies. If you press the gas, it sputters and dies immediately.


Seems like a fuel delivery problem.
May be a bad fuel pump, clogged fuel filter or a fuel line problem.

What car make/model? What engine?

When it dies, try to turn ignition off immediately, wait a couple of seconds and turn the key quickly to the crank position (don't wait with the key in ignition-on position so that the fuel pump doesn't try to pump fuel into the fuel lines).
If it hesitates to start or runs significantly shorter before dying, you have pinpointed a problem with the fuel system.

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