Code PO304

[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