Question about 1990 Oldsmobile Cutlass Ciera

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Car would not start so replaced battery, then alternator; Ran great for roadtrip then shut down on the freeway. Can hear the fuel pump, so replaced the fuel filter; has spark. Has fuel. Wires are in good order. What are we missing--got to be something with the fuel injection system?

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  • Oldsmobile Master
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WHEN A CAR SHUT DOWN ON HIGHWAY OR FREEWAY.YOU CAN STILL HAVE FAULTY FUEL PUMP.IT COULD BE RUNNING BUT THE FUEL PRESSURE CAN BE TOO WEAK.THE 2.5 ENGINE FUEL PRESSURE IS 6.0 TO 7.0 PSI AND THE 3.3 ENGINE FUEL PRESSURE IS 37 TO 43 PSI. ANOTHER THING CHECK TO MAKE YOUR COOLANT IS NOT LOW.LOW COOLANT CAUSES ENGINE GET TOO HOT SHUT OFF.CHECK PVC VALVE AND EGR VALVE MAKE SURE THEY ARE NOT STUCK OPEN OR DISCONNECTED.AND MAKE SURE IDLE SPEED IS NOT TOO LOW YOU IDLE SPEED IS ON THE FACTORY STICKER UNDER THE HOOD.

Posted on Sep 28, 2009

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Posted on Jan 02, 2017

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