Code PO304

[RAZ]

My Vx was running good today. But then this afternoon I ran out to the store and got a flashing check engine light. And it felt like running on 4 cylinders (No power) and smelled like burning rubber! Got back home to check the code and it said linking error. So unhooked battery for 1/2 hour drove around block till light came on and it was PO300 randon misfire. Reset again, drove around block now PO304. It was running bad after both resets
Help I need this fixed any ideas?
Thanks Steve

[tom4bren]

Have you tried to look up those codes in the shop manual? It's in the Download Section.

[RAZ]

PO300 is randon misfire
PO304 is cylinder 4 misfire
Burning smell worries me

[SouthJ1]

I have had both problems my problem was clogged injectors tho and now it is fixed i just sent all of the injectors off and got them cleaned also throw some fuel injector cleaner in see if that helps a little its like 3.99 at autozone.

[Triathlete]

Also tap on the fuel rails to help unclog them. Might also check your plugs. Also since there was a "burn" smell check the wiring going to the plugs to make sure they are okay (especially the ones going to cylinder 4).

[Dmitrikr]

Burning smell - too much unburnt fuel into cat converter - overheating/melting cats may be. Mine was dead coil on cyl#6

[RAZ]

Well I got a new coil pac and it runs good again. But as driving got PO137 bank 1 sensor low volts. Reset it and its stayed off so far. But burning smell still there a little. I hope its just left over gas in the cat? from when cylinder was not firing?

[tom4bren]

Keeping fingers crossed.

[Dmitrikr]

Well I got a new coil pac and it runs good again. But as driving got PO137 bank 1 sensor low volts. Reset it and its stayed off so far. But burning smell still there a little. I hope its just left over gas in the cat? from when cylinder was not firing?

Take it on highway for an hour - to burn all gas from the catalitic. otherwise short trips not good for gasoline flooded cats- no enough flow will glaze cats inside

[deermagnet]

When I had a misfire it was caused by a shorted wire causing the injector to be open all the time. That dumped waaaaaay more gas than a no-spark misfire. The gas smell was incredible. They did an engine flush to get all the gas out. On the way home from the shop I got the code for the sensor behind the cat and thought I would need a new cat. I erased the code on the way home and it never came back after the 60 mile trip home with plenty of high speed driving. A couple years later and the cat is still good.

Your cat may have used up one life, but hopefully it will live for many more years.

Mark

[RAZ]

Drove it for a hour yesterday, Ran good, Smell is alot better and code did not come back. So all is good I hope.

[tom4bren]

Drove it for a hour yesterday, Ran good, Smell is alot better and code did not come back. So all is good I hope.

WooHoo!

That is great news.