Question about 2001 Pontiac Montana

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2001 Pontiac Montana - what is a misfire #5?

2001 Pontiac Montana - what is a misfire # 5? My mechanic has changed the spark plugs, fuel tank, wire set and coil. But it's still running rough when it first starts (shakes - like it's going to stall, although it doesn't) and the check engine light goes on.

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Without your actual trouble code, I am assuming that you are have a misfire on cylinder # 5. The computer cannot really tell what is causing the misfire only that cyl 5 is not putting out full power. If it misfires when cold then smooths out as it warms up, I would say it is probably an injector that is sticky, as it warms up it starts working properly.

Posted on Apr 29, 2010

Testimonial: "Thank you for your suggestion. I will have that checked out. I will also ask my mechanic what the actual trouble code says."

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Put ac plugs back in the montana my 2001 van did the same thing i had new plugs put in and they where not ac plugs and cyl five was missing i could not belive it was the plugs i paid big bucks for them.so i went and bought cheep ac plugs now my van runs great
thanks Rick

Posted on Jun 20, 2010

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What parts do I need to do a tune up on a 2001 Pontiac Montana?


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clean the MAF, Mas Air Flow Sensor in the air intake tube first. Use carb cleaner or MAF cleaner. Do not touch the 2 sensor wires that you spray. delicate!!

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Misfire Definition: A misfiring cylinder is lacking power relative to the other cylinders. The causes for a cylinder specific misfire could be fuel, spark, or mechanical problems. Perform a thorough visual inspection. If no visible concerns are found use the following WDS tools for misfire diagnosis:
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  • Relative Compression (Rule out a possible mechanical issue)
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How do you know if you need to change a fuel filter in a 2001 pontiac montana or if the injectors are bad? If i can heard my fuel pump running does it mean it's still good?


UR OWNERS MANUAL WILL LET U KNOW. ALSO, IF U EXPERIENCE STALLING OR HARD START PROBLEMS.
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