Fixed!
I did replace the fuel filter but that did nothing noticeable. Next I replaced the wires and plugs and that fixed it. Seems like it may have been the #4 wire as that one looked pretty bad but there's no way for me to know for sure as I don't have test equipment and there was no CEL...
Thanks TheDurk
TheDurk, Thanks for your advice. I am going to replace the plugs and will also check the wires and coil boots. To answer your question, there is not a CEL and when I checked with a code reader there are no codes and no pending codes. I've checked now for about 4-5 days of...
I am having a similar problem with my 2002 SR5. It has 366k. About six months ago, I got a CEL with P0420 just like the OP. I cleared it and it came back a week later. I cleared it again and it has not come back. Then, two days ago it had a very rough acceleration after a cold start and the...
Same here
I am having a similar problem with my 2002 SR5. It has 366k. Two days ago it had a very rough acceleration after a cold start and the CEL came on for a few seconds then went out. I turned off the engine, turned back on, and it was still a little rough but not too bad. The next day...
