Question about 1990 Oldsmobile Cutlass Supreme Conv

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Replaces fuel pump, replaced fuel filter , replaces tps, replaced idle air control, replaced crankshaft sensor, still still wont run will start but when you step on the throdle it dies 1990 olds cutlass supreme 3.1

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I'm not too familiar with those motors or their ignition system but i would suggest looking into the ignition system as the culprit in this situation. Check for corrosion under the cap(if applicable), coil, and at the spark plug wire ends.

Posted on Oct 06, 2009

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Injectors

Posted on Oct 06, 2009

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I HAVE A 1991 CHEVRLLET LUMINA 3.1L V6 MULTI PORT FI, IT WILL START AND IDLE BUT WHEN I GO TO ACCELLRATE IT STALL'S, I HAVE CHANGED THE, MAP SENSOR,CRANKSHAFT POSITION SENSOR, FUEL PUMP, FUEL REGULATOR,...


Possibly the throttle position sensor. Or maybe you are having a problem with the fuel injectors. I would have the fuel pressure checked for proper pressure-that's the point of replacing the pump: proper pressure is critical for good driveability. Replacement pumps, particularly aftermarket, can sometimes not perform adequately.

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98 Pontiac GRAND am


The plugs and crank sensor could have done it, but the TPS and idle air control would have nothing to do with a random miss.
A more likely cause is the ignition module or a fuel problem. You may have to wait until the problem is bad enough to kill the engine or you have more codes to check out.

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