Misfire in cylinders two and three

RKIWI1966

MEMBER
2008 HONDA ACCORD
2.4L
4 CYL
160,000 MILES

Put new starter in and a month later it starts mis firing in cylinders 2 and 3. Changed injectors, plugs, caps, crankshaft sensor, MAP sensor, cleaned MAF sensor. Watched a video on putting an OEM starter in there because the one I put in was a cheap starter. Erase codes and they come back as mis fires in 2 and 3. When problems first started code reader said only crankshaft sensor. After replacing sensor, the codes show for misfire in cylinders 2 and 3. Start it up and it idles great and revs up to 5,000 RPMs with no misfire, then after about 10 seconds engine light comes on and it misfires when accelerating but not while idling.

2 Replies

JACOBANDNICKOLAS

MECHANIC
108,254 POSTS

Hi,

Have you checked to make sure there isn't a head gasket issue between the two adjacent cylinders? If you haven't, start by checking engine compression to see if they are a lot lower. Also, are P0302 and P0303 the only codes you are getting? Let me know if there are more.

As far as the compression test, here is a link that explains how it's done:

https://www.2carpros.com/articles/how-to-test-engine-compression

Additionally, here is a link that explains what to look for when checking a possible head gasket issue:

https://www.2carpros.com/articles/how-to-test-engine-compression

Just a few more questions. Let me know if you notice any dark smoke from the exhaust or if there are any odd smells from the vehicle.

Take care and I'll watch for your reply.

Joe