02 GX 111,000 miles, misfire1-4, major loss of power, help

[merlin1977]

02 GX, 111,000 miles,


replaced injectors didnt help, frp 34psi-40psi,
5 codes: misfire cyl.1 P0301
misfire cyl 2 P0302
misfire cyl 3 PO303
misfire cyl 4 PO304
multiple misfire PO300
filters done

intermitent problem, goes away after a couple of min. or you let it sit for 20 min or sometimes by its self, lack of power, codes go away also. please help its driving me craaaaaaaaaaaaaazy!!!

[freedml]

Re: 02 GX 111,000 miles, misfire1-4, major loss of power, help

swap out some coils

[mk600groups]

Re: 02 GX 111,000 miles, misfire1-4, major loss of power, help

If you eliminate ignition as a possibility, it could be, gulp, the fuel pressure regulator $$. My 2000 had similar problem and the OBDII reported pressure was fine. Gave up and had the dealer work on it. They said the regulator was "flapping" and that one side was equalizing with the other side and flooding the engine.

Also switched to iridium spark plugs about 60k miles ago when I first started seeing random misfires. That took care of the problem for a while.

[merlin1977]

Re: 02 GX 111,000 miles, misfire1-4, major loss of power, help

thanks for the help guys

[Larryect]

Re: 02 GX 111,000 miles, misfire1-4, major loss of power, help

Just guessing... But, I would be suspicious of the coils. Friend of mine was having stumbling/misfires, one dealer changed all the injectors and gave up. Second dealer changed the coils - fixed the problem. A lot less miles then yours on an 01. In CA it was covered by the emissions warranty.

[Lakewood90712]

Re: 02 GX 111,000 miles, misfire1-4, major loss of power, help

Park it until the problem is fixed. bad misfire can fry one or both catalists. And them's not cheap.

Is it worse on the first start of the day ?

[Honda Bob]

Re: 02 GX 111,000 miles, misfire1-4, major loss of power, help

It sounds like you might have a problem with the ignition coils. Possibly with the ground wire next to the thermostat. Check to see if that ground wire is loose or corroded.
Honda Bob.

02 GX, 111,000 miles,


replaced injectors didnt help, frp 34psi-40psi,
5 codes: misfire cyl.1 P0301
misfire cyl 2 P0302
misfire cyl 3 PO303
misfire cyl 4 PO304
multiple misfire PO300
filters done

intermitent problem, goes away after a couple of min. or you let it sit for 20 min or sometimes by its self, lack of power, codes go away also. please help its driving me craaaaaaaaaaaaaazy!!!

[Curtis]

Re: 02 GX 111,000 miles, misfire1-4, major loss of power, help

Welcome to the group, Bob. I was wondering if you were ever going to drop by.

[merlin1977]

Re: 02 GX 111,000 miles, misfire1-4, major loss of power, help

update checked the new coils and found some carbon tracking on cyl 3 hope that fixes it. thanks again guys