I have a 2001 Oldsmobile Alero that is hesitating when accelerating. I've changed the TPS, Plugs, Wires, Coil packs, fuel filter, and EGR valve. Anyone have any other ideas for this issue. Secondly, I have a squeel that sounds like the belt but I removed the belt and it still squeels. Is there a timing chain tensioner that may be squeeling?
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bad computer will set off check engine light.you will get a PCM fault code.computer problem will cause engine run poorly no power back up mode,bad computer will cause no start problems.your problem sound like faulty TPS SENSOR.clogged fuel filter and clogged air filter.fuel injectors dirty need cleaning.
CODE SCAN FOR FAULTY TPS SENSOR.IF TPS SENSOR BAD YOU WILL SEE CHECK ENGINE LIGHT FLASH ON.A BAD TPS SENSOR WILL CAUSE HESITATION DURING ACCELERATION. IF TPS SENSOR OKAY NO CHECK ENGINE LIGHT FLASHING. DIRTY FUEL INJECTORS AND STOPPED UP FUEL FILTER WILL CAUSE SAME PROBLEM.
You have replaced too much already. You're not gettinf a proper response due to an improper input. Look at and/or change your TPS (throttle position sensor)
could bea few things. Excessive moisure, low fuel pressure, Faulty coil pack, spark plugs gap or wires. Have you changed any of those at all? Let me know
Start with the ignition controll module, it's located under the coil pack and can be tested at most parts stores. also could be the crank or cam postion sensors.
My 1996 Astro does the same thing... It has new fuel pump, fuel filter, plugs, wires, cap, rotor, maf sensor, ignition coil, alt., battery, cat converter, im stumped...
change plug and wire if its been a while most cars have 90000 miles platinum plugs in them.but the wires wear before plugs.so change plugs and wires.+clean fuel injectors .change fuel filter and air filter.if car still run rough your idling to low.have idling check .
My 2000 is doing that exact same thing. did you ever get this figured out.
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