Question about 1997 Pontiac Grand Prix

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Misfire in cyl 6

What could be the problem an the price range just had new spark plugs bout 4 mounths ago

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  • Expert
  • 129 Answers

Bad coil pack possibly.thats the three square things near back of motor .plug wires go into it.

Posted on Nov 29, 2012

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: I am getting a misfire

Here is a copy of the "Policy Adjustment" that I took to the dealer with me this morning. Hope this helps any of you.

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Subject: Special Policy Adjustment - Catalytic Converter #05551 -(09/14/2005)
Models: 2001-02 CHEVROLET IMPALA, MONTE CARLO
2001-02 PONTIAC GRAND PRIX
2001-02 BUICK REGAL
EQUIPPED WITH 3.4L (RPO LA1 - VIN E) OR 3.8L (RPO L36 - VIN K) V6 ENGINE
----------
Condition
Some customers of 2001-02 Chevrolet Impala, Monte Carlo; Pontiac Grand Prix; and Buick Regal model vehicles, equipped with a 3.4L (RPO LA1 - VIN E) or 3.8L (RPO L36 - VIN K) V6 engine, may experience a condition where the vehicle exhaust catalytic converter is replaced due to complaints of lack of power or illumination of the Malfunction Indicator Lamp (MIL). This may be due to the front endcone insulation from the catalytic converter breaking away and blocking the front of the first catalyst brick and preventing the free flow of exhaust gas through the converter.
Special Policy Adjustment
This special policy covers the condition described above for a period of 10 years or 120,000 miles (190,000 km), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership. The repairs will be made at no charge to the customer.
For vehicles covered by Vehicle Service Contracts, all eligible claims with repair orders on or after September 15, 2005 are covered by this special policy and must be submitted using the labor operation codes provided with this bulletin. Claims with repair orders prior to September 15, 2005 must be submitted to the Service Contract provider.
Vehicles Involved
Involved are all 2001-02 Chevrolet Impala, Monte Carlo; Pontiac Grand Prix; Buick Regal model vehicles, equipped with a 3.4L (RPO LA1 - VIN E) or 3.8L (RPO L36 - VIN K) V6 engine and built within the following VIN breakpoints:
Year
Division
Model
From
Through
2201
Chevrolet
Impala
19100001
19378250
2001
Chevrolet
Monte Carlo
19100001
19378233
2001
Pontiac
Grand Prix
1F100004
1F275188
2001
Buick
Regal
11100004
11338085
2002
Chevrolet
Impala
29100001
29374833
2002
Chevrolet
Monte Carlo
29100016
29374832
2002
Pontiac
Grand Prix
2F100019
2F276927
2002
Buick
Regal
21100001
21288762
Parts Information
Parts required to complete this special policy are to be obtained from General Motors Service Parts Operations (GMSPO).
Part Number
Description
Qty/ Vehicle
10343187
Converter, Catalytic (L36 engine)
1
10343185
Converter, Catalytic (LA1 engine)
1
10328740
Gasket, Catalytic Converter (Converter to I-Pipe, both)
1
15286606
Gasket, Exh Manif Pipe (L36)
1
24505057
Gasket, Exh Manif Pip (LA1)
1
Customer Notification
General Motors will notify customers of this special policy on their vehicles (see copy of typical customer letter included with this bulletin - actual divisional letter may vary slightly).
Service Procedure
Catalytic Converter Inspection
Begin the inspection by reviewing the condition described by the customer. Refer to "Description and Operation," SI document 657895, to help you determine the correct symptom diagnostic procedure when a malfunction exists.

Posted on Feb 08, 2009

GM Elec
  • 1000 Answers

SOURCE: 1998 pontiac grand am misfire cyl 4

I'm a bit confused concerning your spark plug wires as the standard 2.2 engine does not have them, so my suggestion is based on the 2.2 engine as the 4 cylinder you state you have.
If the secondary electrical has been replaced, I would suggest inspecting the fuel injectors for operation.
The easiest way to test the operation of the fuel injectors is to listen for a clicking sound coming from the injectors while the engine is running. This is accomplished using a mechanic's stethoscope, or a long screwdriver. Place the end of the stethoscope or the screwdriver (tip end, not handle) onto the body of the injector. Place the ear pieces of the stethoscope in your ears, or if using a screwdriver, place your ear on top of the handle. An audible clicking noise should be heard; this is the solenoid operating. If the injector makes this noise, the injector driver circuit and computer are operating as designed. Continue testing all the injectors this way.
If all appear to be functioning we can move on to the next suggestion.
Let me know.
Regards.

Posted on Mar 31, 2009

  • 15 Answers

SOURCE: 2001 pontiac cowl pack not fireing.

Here is a diagram of the firing order for you 3800 engine. Cylinders 1 and 4 are misfiring because the operate under the same "Coil Pack" and the coil pack has unfortunately gone bad. O'Reilly sells them for between $30-50 depending on the amount of warranty coverage you want. To replace, simply unscrew the screws that hold the coil pack in place. WAIT before unplugging the plug wires. Place the old coil pack and new coil pack next to each other, unplug one plug wire, then plug it to that same port on the new coil pack. then do the same for the other plug wire. Then screw your new coil pack in place, and start you car. should run fine!

3098a58.jpg

Posted on Dec 14, 2009

roniecon
  • 6826 Answers

SOURCE: will not start,code shows misfire on cyl 6 have

The coil pack is most likely the problem for the miss fire on the cylinder,but the engine most of the time will still run,just poorly.Crank shaft sensor would be the next thing to check,if there is fuel pressure present at the fuel rail.Also enough fuel pressure.

Posted on Jan 03, 2010

  • 193 Answers

SOURCE: 03 Grand Am with 4-cyl. #2 misfire (code; p0302).

I don`t see where you have replaced the plug wires, I would do this next.



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Posted on Dec 01, 2010

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1 Answer

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How to fix code P0306 cylinder 6 misfire?


Swap spark plug with cylinder 4. Swap COP (coil over plug) with cylinder 2.
If problem moves to cyl 4, bad spark plug.
If problem moves to cyl 2, bad COP.
If problem remains in cyl 6, suspect valve or piston problem.
Start with compression check

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Replacement Spark Plugs Continually Misfiring for Cyl. #1


Locate the ignition coils - they are mounted on the ignition module. Remove the wide connector that goes to the module. You will have to unscrew it first. Spray some WD40 on the connector pins and try to scrub them with a tip of a small screwdriver. Be delicate not to brake or bend anything. Reconnect the connector. Start the engine and see if it still misses.
If it still does, try to touch/move each of the wires that go to the ignition module. BE VERY CAREFUL not to touch any of the moving parts of the engine as you have to do it with engine running.

If it still misses, do the following.
1. Engine off
2. Mark the ignition wires so that you reconnect them later in the same order
3. Locate the coil which gives spark for cyl 1
4. Switch locations of this coil with any of the two remaining coils
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If it now misses on another cylinder, you will have to buy a new coil.

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New plug misfire in dodge ram 1500 6 cyl van


could be your coil, but can also be internal, have you replaced both the air & fuel filters ? if so, dump some good fuel injector cleaner into tank when half empty , top off with 91-92 octane fuel, see how that works for you, do some highway driving, stop & go traffic creates problems, todays fuel w/ethonal is bad for older cars, be sure to have code cleared from ecm !

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Was misfiren bad put new plugs in it and run good for bout half a day then started back. computer says misfire cyl. 4 and 6


Could be wires? Or coil pack, if it is same one for those two especially. Wires could be touching metal anywhere? If so it will easily arc through and shor out. It will make a ticking sound when running. Or could be something getting into cylinders fouling out plugs. Liike water from coolant system. Was plugs wet?

Dec 17, 2010 | 1996 Toyota T100

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2006 dodge caravan, 6 cyl. relaced cole, sparkepugs and wires in oct. 2009. Engine is reading #2 cyl. misfire again. Why


Firts time swap spark plug & ignition coil between two different cylinders and read again if the same #2 cyl. misfires !
If #2 cyl. is OK and another cyl. misfires then spark plug or ignition coil is out of order and must be replaced.
If #2 cyl. misfires again then #2 injector must be checked !
If ignition coils & spark plugs (complete set for 6 cyl.) are replaced then you must check #2 injector !

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1 Answer

Check Engine Light coming on


get the soft ware up grade. and have the coils checked.

Mar 03, 2010 | 2002 BMW Z3

3 Answers

#6 cylinder misfire


Could be a valve seat burnt, check compression, if lower than the rest, probably that or a head gasket leak next to #6.
Borrow or buy a compression tester or get a garage to test for you.
To fix you will have to determain wether the valve can be ground back in or a new seat is required, but either way, as it's a big job, get all the valves done as if one has gone, how long before more go?

Jul 12, 2009 | 1999 Chevrolet Tahoe

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