I’m not new to working on cars, but this one has me a bit confused:
I bought my kid a 1999 CRV AWD automatic after he hydrolocked his 2004 TSX driving through a flooded street.
It ran fine when we got it, it just needed tires and I didn’t know how old the timing belt was. A few weeks after I bought it I put a new timing belt and water pump on it. I also replaced the spark plugs and wires at the same time. A couple weeks later (he drives it every day) he said his CEL popped on. I pulled the codes and I had misfires on all cylinders. The car seemed to run fine so I just cleared the codes. A few days later he said the light came back on but the car seemed to be fine. I thought maybe the distributor was starting to go out but cleared the codes again and did nothing.
About a week later he says it’s running bad. I start it and I can see it has a dead miss. The engine light is flashing and once again: codes are 301, 302,303, and 304. I pulled the spark wires off one at a time with the engine running and cylinder 4 was definitely the one not firing. I tested spark, listened to the injector, then pulled the plug and saw it was wet with fuel. I did a compression test and had 30 psi.
It turned out to be a burned exhaust valve. I pulled the head and sent it to a machine shop for a new valve and full clean/valve job. I reinstalled it and the car seemed to run fine. A week or so later we’re back to having misfires on all cylinders! And this time I can feel an intermittent miss.
I have no idea what to do and I’m afraid if I do nothing I’ll get another burnt valve?