Question about 2002 Pontiac Grand Prix

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I have a cylinder misfire on #1so the coder has no power

I put new sparkpluges and fule filter but that did not chang anything

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Check #1 fuel injector

Posted on Oct 04, 2009

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2000 Dae Woo Lanos 1.5L keep getting a DTC Code

you will have to check the fuel injector for operation. then check for a vacuum leak where the intake mounts by cylinder 4, could also be a compression problem for that cylinder. an 02 sensor won`t cause a single cylinder misfire or fuel filter.

Sep 18, 2014 | 2000 Daewoo Lanos

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2000 Dae Woo Lanos 1.5L keep getting a DTC Code P0304 cylinder 4 misfire got new plugs and wires? Could be my O2 sensor or something to do with my Fule Filter. Thanks please Help!

It could be a fuel injector or a bad cylinder. A bad cylinder is easy enough to figure out with a compression tester. A and fuel injector can be swapped with another cylinders injector to see if the misfire follows the injector.

Sep 18, 2014 | Cars & Trucks

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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?

Bad miss at idle?

While stop engine idles like cylinder missing?

Engine Misfire codes for car?
Engine Misfire codes?

Misfire on cylinder 4?

Oil on spark plugs and car misfires?


This will help.


Feb 17, 2012 | 2001 Oldsmobile Aurora

1 Answer


It could be any of the above but,i would bet its a sparkplug that's fouled or just worn out.

Jan 31, 2012 | 2004 Mitsubishi Endeavor

1 Answer

1996 isuzu rodeo keeps reading #2 misfire runs good xcept when cold it hesitates most times or jus occasionally hesitates then the check engine light flashes and its guzzling gas i only got 50 miles on a...

A misfire alarm typically means the coil pack mounted above the sparkplug indicated in the misfire had gone defective.

To test it, swap the coil pack with another cylinder, and see if the misfire goes from #2 to the cylinder you put it on.

If the misfire continues to be on #2, then consider changing the sparkplugs.

I hope this helps.

May 14, 2011 | 1996 Isuzu Rodeo

4 Answers

I have a 2002 Volkswagen Jetta GLI 2.8L VR6 I have recently done a diagnostic on it cause it running rough, and it came back as a cylinder 2 misfire. Help?

This is common, the car is misfiring in that cylinder, this is caused by a bad sparkplug or a coil and last a control module will also cause this, a good test is to first swap the coil with another cylinder and run the car a few miles then have it scanned to see if the misfire moves to another cylinder that you switch coils with, if this happens then you will know its the coil, but if it doesnt move then it may be a sparkplug or the module, heres a diagram to show you where # 2 cylinder is, hope this helps, good luck let me know how it goes.johnjohn2_5.jpg

Nov 04, 2010 | Volkswagen GLI Cars & Trucks

1 Answer

Misfire #1 cylinder (autozone scanner) I changed all plugs, boots, and #1 cylinder coil. Went back to autozone and says misfire #1 cylinder. should I try replacing #1 injector now?

inspect the sparkplug plug first!! After engine is running for 20 sec (while misfiring), pull your #1 sparkplug and check for fuel. If there is no fuel replace the injector!!If there is fuel, post a comment for more help!!

Sep 01, 2010 | 2004 Chevrolet TrailBlazer

2 Answers

All of the suden started running rough, changed fuel filter, cap rotor and plugs & wires 6 months old, could it be as simple as bad gas or water in it, if so what do you do add good gas?

could be a coil or even a ignition module issue. I doubt its a gas issue. Could be clogged injectors or even a failed injector. You need to determine what cylinder is misfiring by unplugging wires untill you find the one that doest change the RPM. Also a intake gasket leak could cause a given cylinder to misfire.

May 19, 2010 | 1990 Ford Bronco

1 Answer

My 2000 hyundai acc

Possibly coils check compression make sure the plugs are the proper ones some engines are particuler about the plugs

Mar 04, 2009 | 2000 Hyundai Accent

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