Question about 2000 Oldsmobile Alero

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2000 olds alero engine misfire replaced plugs still misses service engine light is on

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Check spark plug coil pack's, make sure that there firing, look for spark at end of boot.

Posted on Sep 08, 2010

  • cdd_woody Sep 08, 2010

    It's 2.4L, would the coil pack be attached to the "top plate" which covers/holds plug wires?

  • Alexander Mimun
    Alexander Mimun Sep 08, 2010

    Yes coil packs are cover, with the cover on top of valve cover, only way to check, is remove cover, remove spark plug boots, used old spark plug wire, go to a repair shop, I'am sure they will give you 4 old spark plug wire's, connect old wire's to coil adapter and other end to spark plug, disconnect one at a time to check for spark.

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2001 Olds Alero 2.4 idles rough misses acasionally then under torque at 3000 it misses and Trac off light comes on and service engine light flashes


Go to an auto parts store and have them scan for a code. That should give you an indication of what is wrong with it.

Feb 06, 2015 | Cars & Trucks

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What do I do next? My 2001 olds alero 3.4l v6 is misfiring constantly. Scanned obd2 error code p0301. Already changed spark plug, wire, and coil for cylinders 1 and 4. Still have same problem.


I recommend checking all injectors and O rings on the injectors if an O ring cracks air can raise Cain with misses so can injectors another thing is cam to look at will cause a constant miss but only on 1 cylinder at a time but doubt its the cam. check injectors and O rings also pull 1 plug wire at a time with wire pliers while engine is running and find the 1 cylinder that is giving you the problem when you pull the plug wire that is missing the engine will smooth out then that cylinder is your problem wear rubber gloves with the plug wire pliers so you dont get bit let me know if i can help please rate my solution as this is how i earn my achievements on fixYa thanks.

May 22, 2014 | 2001 Oldsmobile Alero

1 Answer

2000 nissan frontier, started missing engine light came on so we replaced plugs and wires and reset light runs better but still has a little miss... any other suggestions


misfire, has many cause, i have 50 reason list. for get that.
1: bad engine compression, or other major engine issues. mech.
2:bad spark
3: bad fueling. (too much or too little)

it only takes a few tests to find which it is, and in that order.
above assumes, 13.3 to 14.7v at the EFI system at all times running.
and EGR is not leaking.
what does engine light mean.
are you saying the CEL , check (service) engine light glows running? if yes ? why not scan it and report all DTC codes present. P0300 is random misfire. and P0301 is #1 cyl misfire.
as 2 examples.

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1 Answer

HAD 2001 OLDS ALERO COMPUTOR CHECK SAID # 2 CYLINDER WAS MISSFIRING CHANGED #2COIL PACK STILL DIES WHEN SLOWING DOWN OR STOPING BUT STARTS RIGHT BACK UP DIES WHEN STOPPING OR SLOWING DOWN ALSO DIES AFTER...


Sounds like #2 is still missing. Misfires can be caused by an ignition problem, a fuel problem, or a mechanical problem where there is no compression in the cylinder.
Okay, you have changed the coil. Now try changing spark plugs and the spark plug wire-Swap #2 and #1 spark plugs and the plug wire too, and see if misfire follows now on #1. If it does, bad plug or bad plug wire. Of course you could just drop a new plug into #2 and see what happens. If no change, swap the plug wires and test again. If still misfiring, check the spark at end of plug wire-you need to see a blue snapping spark to know the ignition is working good on that #2.
If you have spark there, need to check if the injector is pulsing and spraying fuel into the cylinder. You might be able to feel the injector pulse if you hold a finger lightly on the injector while engine is running-should be a steady, rather rapid click feel to the injector. If not sure, have the injector circuit checked. You can buy an inexpensive "noid light" at auto parts stores, one that fits your injector circuit, plug it into #2 injector, and crank the car over or run the engine and watch the light-if working, the noid light will be blinking. This verifies the circuit is good. If the spark plug is wet with gas when pulled out, that would verify that injector is spraying fuel into the cylinder.
If still no help, have the compression checked in #2. Low compression from a valve problem or head gasket problem can cause misfires.
Good luck.

Sep 20, 2013 | 2001 Oldsmobile Alero

1 Answer

I have a 2000 alero an it started missing an making a popping noise out of the tail pipes then the trac an service engine light came on


The check engine light tells you the computer has found a problem with the performance of the engine. Have someone check the computer for trouble codes.

Dec 08, 2012 | 2000 Oldsmobile Alero

1 Answer

Cylinder 1 misfire in 2000 mercury mystique


Please go to this link for misfire diagnosis and testing.

Jul 02, 2012 | 2000 Mercury Mystique

1 Answer

My 2001 oldsmobile aurora is misfiring and sputtering after i replaced the spark plugs?


For engine misfiring problem check the help links mentioned below. Click the link below to go through the troubleshooting procedure :---- Engine misses and truck jumps? Hard to down shift? Issue with high gear only? http://technoanswers.blogspot.in/2012/02/engine-miss-and-truck-jumps-hard-to.html

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Bad miss at idle?

http://technoanswers.blogspot.com/2012/01/bad-miss-at-idle.html

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While stop engine idles like cylinder missing?

http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

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Engine Misfire codes for car?

http://schematicsdiagram.blogspot.com/2011/12/engine-misfire-codes-on-chevrolet.html
Engine Misfire codes?

http://schematicsdiagram.blogspot.com/2011/12/engine-misfire-codes-on-chevrolet.html

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Misfire on cylinder 4?

http://schematicsdiagram.blogspot.com/2011/12/misfire-on-cylinder-4.html

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Oil on spark plugs and car misfires?

http://technoanswers.blogspot.in/2012/02/oil-on-spark-plugs-and-car-misfires.html

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This will help.

Thanks.

Feb 17, 2012 | 2001 Oldsmobile Aurora

1 Answer

S10 pickup misifirng when light highway load


I had to rebuild my engine at 97000 miles cuz of low engine oil pressure and bad berrings

Dec 14, 2008 | 2000 Chevrolet S-10

4 Answers

2001 oldsmobile alero


I have a car in the shop right now same thing - it is being caused by a misfire. Need a real technition to diagnose the problem (auto zone - advance auto can't diagnose the problem - only read the code)
mine was caused by a failing fuel injector. good luck

Jun 26, 2008 | 2001 Oldsmobile Alero

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