Question about 1997 Pontiac Grand Am

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Pontiac Grand Am 97'

What would cause misfiring in cylinders 2 and 3 in the 97' Pontiac Grand Am?

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  • sharon_wiseh Mar 09, 2009

    I have the same problem with my grand am, replaced the cover a couple of months ago and it's happening again.

  • daleandann May 11, 2010

    I have a '97 Grand Am with the above mentioned troubles... It's a V-6 engine. I have installed New Plugs, New wires, new Tranny Fluid & Filter, Oil & Filter, AND I added four bottles of Injector Fluid then drove it fifty miles or so... with NO good results. What now????? THANKX for your help! :-)

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  • Pontiac Master
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The check engine light should turn on during a misfire. If you don't have an OBD2 diagnostic tool, go to your local parts place and have it checked out. My local Autozone and Advance will do it for free and let you know what's wrong. Don't start changing parts until you know what's really wrong. That's a waste of money! I had a 1997 Grand Am 4 cylinder and the OBD2 code was a misfire on two cylinders. They shared a common coil and I changed it, then the misfire was gone.

Posted on Jun 08, 2009

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I have a 97 grand am with a 6 cyl. that was also experiencing the same misfire problem. I thought it was water in the fuel. I put fuel fuel injector cleaner and heet in fuel tank, and it would do a little better for a while but the symptoms would return. I was about to remove the injectors to see if they were clogged but decided to check out the coil packs instead . Using a spark tester connected between the coil and plug wire I noticed that the coil for cyl # 5 and # 2 was not firing when accelerated. So I purchased a replacement for that coil and now it runs fine!

Posted on Mar 31, 2009

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  • Master
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If it is a 4cyl probably a bad coil cover

Posted on Aug 21, 2008

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Can catalytic converter on 98 Pontiac grand prix cause misfire on cylinders in car


No, a plugged converter would cause the engine not to breathe properly. Too much back pressure would stall the engine or make it run very poorly. It would not be local to any one cylinder-all of them would be affected.

To diagnose a misfire in one cylinder, well, you start at that cylinder. It could be ignition related- the spark plug and spark plug wire for #6, possibly the ignition coil for #6 in the coil pack for the engine. (A v-6 would have 3 coils in the coil pack, one coil for 2 cylinders.) It could also be fuel related, so the fuel injector for cylinder 6 should be considered. And the last reason for a misfire is usually the most expensive repair: low compression in #6. This may be a head gasket problem, or a piston ring problem, or one of the valves for #6 may not be sealing well, causing low compression and the resultant misfire. The engine computer codes a misfire when it senses low power output from that particular cylinder. The misfire causes a lag in crankshaft rotation, and the crankshaft position sensor senses it.

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Misfiring on cylinder #3


Misfiring can be cause by ignition coil,spark plugs,wires,engine valve,cylinder compression,
if it's a quad four then crack around the ignition coil. there is 2 coils like 1-4 coil and 2-3 coil
first check spark plug color or foul of gaz
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Firing order for a 97 pontiac grand am se


For the 1997 Pontiac Grand Am:
I do not know if you have the 2.4L DOHC In-Line 4-Cylinder or the 3.1L V6. However I have included both below. I suspect based on the SE Model you have the 3.1L V6.

For the 2.4L DOHC In-Line 4-Cylinder:
Firing Order:
1-3-4-2
Cylinders:
..........(back).........
|...1....2....3....4...|
..........(front)

For the 3.1L V6:
Firing Order:
1-2-3-4-5-6
Cylinders:
......(back)........
|...1....3....5...|
_____________
|...2....4....6...|
......(front)
Ignition Coil Connections
_____..____...____
|..O..|..|..O..|..|..O..|
|.5..2|..|.3..6|..|.4..1|

Let me know if this helped.....

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I have a 97 pontiac gp i had it scanned to see why my service engine soon light was on it came back that cylinder 5 was misfiring i changed the coil pack,plugs,and wires but it still say cylinder 5 misfire...


Replace your #5 cylinder fuel injector. You rough idle sounds like low, or no fuel to the cylinder. Your hesitation on accelleration says the same.. A new fuel injector should resolve your issue.

I hope this helps you, and I wish you luck on your repair.

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Pontiac Grand Am 97'


di you change the spark wires? is there a change you changed wires and with that you changes the spark sequence?, if so swap the wires from those cyl.
hope it helps

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2 Answers

Cylinder 3 misfire


Make sure you're using the recommended spark plugs. When my car did that, I had put Bosch Platinum Plus-4 plugs in and got that same problem. Turns out the plugs are too hot and cause it to fire prematurely and kick the misfire code.

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