Question about 1999 Oldsmobile Alero

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1999 oldsmobile alero does not idle right

Hard to start and when i do get it to start it idles rough and below the 1 on the rpm what could this be

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It sounds like an injector problem....try filling the tank, and adding a bottle of fuel injector cleaner...that's the least expensive way, I would try that first. You may have to do this a couple of time if their real dirty.

Posted on Feb 01, 2009

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01 alero hard start and rough idle


If the Catalytic converter is bad the engine will over heat while driving.

May 28, 2012 | 2001 Oldsmobile Alero

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1999 alero rpm goes up and down


Could be a number of things causing this:

1. Bad MAF (Mass Air Flow) sensor can cause erratic idling
2. Dirty fuel injectors
3. Dirty or worn spark plugs
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Oct 01, 2011 | 1999 Oldsmobile Alero

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My 99 alero's rpm gauge is flucuating now what is the problem?


YOUR ENGINE IS DOING A THING LIKE ERRATIC IDLING.THE POSSIBLE CAUSE CAN BE MANY THINGS LIKE LOOSE BOLTS ON THROTTLE BODY OR INTAKE.LEAKING VACUUM HOSES.DIRTY FUEL INJECTORS.BAD PLUGS AND WIRES.ALSO DIRTY THROTTLE PLATE WITH CARBON BUILD UP ON THE THROTTLE BODY. CAUSE ROUGH OR ERRATIC IDLING.

Oct 13, 2009 | 1999 Oldsmobile Alero

1 Answer

Running roug at low idle, smooths out at 2500 rpms


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1999 Alero stalling and trac off light coming on


does the rpm motor kick down? you may need to check your vacuum hoses, and also you may want to check your exaust, sounds wierd but that can cause the car to stall at times.as for the traction light, your hitting the brakes to hard. try slowing down a little slower while stopping, and keep distance for saftey.. if you can take it a little slower at lights and turns, without braking hard and it stops stalling.

May 20, 2009 | 1999 Oldsmobile Alero

1 Answer

1999 olds alero stall whe you take your foot off the gas and occasionaly wont start


hard start is AM is most commonly caused by a defective fuel pump pressure check valve, the other stall is issue is covered by the following procedure.
Here are some of the causes of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Apr 08, 2009 | 1999 Oldsmobile Alero

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