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02'sixer
New User
Feb 7, 2009, 7:39 AM
Post #1 of 2
(1149 views)
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Engine keeps dieing
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Hi, I'm new here. I've run out of ideas for what could be left that would cause this.
1990 oldsmobile cutlass supreme 3.1 L V6 fuel injected, 120k miles
On the way home the engine suddenly wouldn't go past idle, and would die if the gas was pressed. I pulled over to the side of the road where Idled for a few minutes before dieing. Since getting the car home we've found out that the engine will start and idle for a few minutes/seconds before dieing and that if we put it into gear it will almost immediatly die with a sound like its getting starved.Since then I have replaced the TPS, cleaned the MAF, checked the spark plugs, replaced the fuel filter, fuel strainer in tank, replaced the fuel pressure regulator, and checked the fuel pump relay/fuse. A few weeks before this happened we replaced the fuel pump.
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Loren Champlain Sr
Veteran
/ Moderator
Feb 7, 2009, 11:43 AM
Post #2 of 2
(1143 views)
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Re: Engine keeps dieing
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The first problem will be determining whether it is actually running out of fuel, or losing spark when it dies. Have you performed a fuel pressure test? If so, post the pressures with and without the regulator connected. If you are losing spark, could be crank sensor or control module. The ignition coils can/do go bad. If you have good fuel pressure, but still is starving for fuel, check/clean IAC (might be stuck wide open). Of course, check carefully for vacuum leaks. I've had several 3.1 engines where one injector will short out and take out two more, electrically.
You'll probably have to pull the plenum, but a resistance check of all of the injectors may be in order.
Loren
SW Washington
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