Yesterday my CEL came on and I went to autozone today and pulled the codes. This is what came up.

2002 S2000 76,916mi

P0301 - Cylinder 1 misfire
P0302 - Cylinder 1 misfire
P0303 -Cylinder 1 misfire
P0304 -Cylinder 1 misfire

P0300 - Random Cylinder Misfire
P1399 - Random Cylinder Misfire


Anyone seen this combo or know what direction I should head first?

Any help will be appreciated.

 

Same thing.happened to me yesterday. Car runs fine. I erased the.codes.to see.if they return but will be taking it to q shop fora.tune up and some work anyway. writing from my Droid. makes it.look like.damn morris code.

 

P0300 Random/Multiple Cylinder Misfire Detected

P0301 Cylinder 1 Misfire Detected
P0302 Cylinder 2 Misfire Detected
P0303 Cylinder 3 Misfire Detected
P0304 Cylinder 4 Misfire Detected

From other threads many have said they changed their injectors. I would not recommend this as it may set you back $400 and still have the CEL. 2 things: clean air filter and routing, then pull your plugs and see if they are discolored. I had these same codes pop up before and went to the NGK Iridium plugs. No issues after installing them. I also rotated the coils (4,3,2,1 to 1,2,3,4) and this seemed to work fine.

 

Thanks for the advice. I will start with the plug replacement and air filter cleaning( I have a K&N) and report back.

 

I checked my plugs. Shitty Bosch plugs which were in it when I bought it were loose and the tip of the plug, not the electrode-the opposite side tip, had unscrewed itself from the plug. I guess it would be the cap. So far no codes have come back. I can't believe the plug itself was coming apart like that. Ngk or pulstar only is what I've always recommended. Stay away from Bosch.