Question about 2000 Pontiac Grand Prix

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I have a 2000 grand prix gtp and I've replaced heads wires plugs ignition coils fuel injector fuel pump and I stool get a misfire in cylinder 5 code any ideas

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Ignition control module would be a good guess without being able to test things.

Posted on Mar 28, 2011

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If your getting your info from code in ecm on the misfire, you may need to reset your ecm , If you can feel your misfire you might check Distrubtor cap. good luck to you.

Posted on Mar 28, 2011

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2000 Jeep Grand Cherokee Laredo 4.7 liter code reads p0307 turn the car off when I turn it back on started misfiring and sputtering and wont stay started now help


code p 0307 is misfiring on no 7 cylinder ====causes --- engine mechanical fault ---wiring---ignition/ fuel system--injector --ECT/MAF sensor---ECM
look for low fuel pressure or ignition control module

May 31, 2016 | 2000 Jeep Grand Cherokee Laredo

3 Answers

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.

Feb 01, 2015 | 1998 Pontiac Grand Prix

3 Answers

2000 Nissan mis firing,, code reader shows codes: 0430; 0305; and 1320. Assuming its bank 2 cat convertor. Is this where i should start???


Your going to be spending plenty

You have to diagnose & correct your cylinder misfires
& make sure you have proper fuel control -- BEFORE--
you replace the Exhaust Converters & Oxygen Sensors,
ruined from the misfires

Properly diagnosed & everything done correctly,your looking
at about $1,000 & that is normal & those thing happen, on ALL
vehicle,even if you do all your own work

I would suggest you have a pro work on it,the best you can find
ASE Master Mechanic with L1 Certification

Oct 02, 2014 | 2000 Nissan Maxima

2 Answers

My 2001 grad prix stumbels at acceleration once in awhile and in park sometimes there is no engine codes and i've changed pretty much everything plugs wires coils fuel filter and i even cleaned th


You did oxygen sensors at 100,000 miles

No exhaust leaks

No intake or evap leaks

Changing parts doesn't answer the question
Do you have ignition misfires

Egr problems

Mar 13, 2013 | 2000 Pontiac Grand Prix

1 Answer

99 pontiac grand prix that is still mis firing even after we changed plugs and wires, not sure what to do now please help


Misfires can be caused by several things including all the parts you have already replaced as well as faulty ignition coils, faulty injectors, vacuum leaks and engine mechanical problems such as low compression.
With the proper equipment, injector operation can be verified by performing injector balance tests, where the operation of the injectors in the misfiring cylinders is compared to the other cylinders that are not misfiring.
Also, engine mechanical failures such as bad piston rings or leaking/burnt valves can be diagnosed with a simple compression test.
An easy (and very inexpensive ) way to verify ignition coil operation is to swap the coil from the misfiring cylinder(s) with the coil(s) from the cylinder(s) that is(are) not misfiring. Then clear the fault codes and drive the vehicle. If the same cylinders are still misfiring, the coil is not the problem. If the misfire moves to the cylinder that you swapped with - replace the coil.
Sometimes, injectors can also be tested this way, but on most GM V-6 or V-8 engines, this is not practical due to the labor involved in "swapping" injectors.

May 10, 2011 | 1999 Pontiac Grand Prix

1 Answer

Acura mdx 2001 ingine codes p1399 andp300 as well others codes 305


All these codes indicate you have a misfire on cylinder number 5.
P1399/P0300 - Random/Multiple Cylinder Misfire Detected
P0305 - Cylinder #5 Misfire Detected

Causes:
- Improper spark plug at cylinder #5
- Insufficient compression at cylinder #5
- Incorrect fuel pressure
- The injector circuit is open or shorted at cylinder #5
- Fuel injector #5 may be faulty
- Intake air leak at cylinder head

Solutions:
- Perform Injector Service
- Replace Spark Plug #5
- Replace Injector #5
- Replace Ignition Coil #5

Mar 09, 2011 | Acura MDX Cars & Trucks

1 Answer

I ran a scanner on my 2002 pontiac grand prix 3100 V6 and it reads out as multiple misfire i already changed the spark plugs,what could the problem be?


A code “multiple misfire” may mean that one or more of the following has happened:

•Faulty spark plugs or wires
•Faulty coil (pack)
•Faulty oxygen sensor(s)
•Faulty fuel injector(s)
•Burned exhaust valve
•Faulty catalytic converter(s)
•Stuck/blocked EGR valve / passages
•Faulty camshaft position sensor
•Defective computer

If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.

Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.

Feb 01, 2010 | 2002 Pontiac Grand Prix

1 Answer

1999 pontiac grand prix gtp won't start


well from what it sounds like is that it is your fuel injectors try going to a full service garage and have them clean the fuel injectors if you cant get it there go to auto zone and pick up a can of sea foam and do it your self thru a vacum line such as the brake booster there is a vacum line that comes out of that and goes straight to your cylinder that will help you there its recomended once a year or every 15000 miles good luck hope it works for you

Jul 06, 2009 | 1999 Pontiac Grand Prix

2 Answers

I have a 1997 grand prix gtp.it has been misfiring for the past few weeks. i had it scanned and it said #6 is misfiring. i have changed the plug, plug wire, coil pack, and injector and it is still missing....


if as soon you give gas it dies i would check the gas pressure it should be about 50 psi if it good check the compression on that cylinder thats a start let me no

Mar 03, 2009 | 1997 Pontiac Grand Prix

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