General Honda Civic ForumGeneral Honda Civic Forum - This is the place for general Honda Civic discussion. If you have questions about the history or future of Honda Civics, factory specs for the Honda Civic, or other general Honda Civic Questions.
Welcome to civicforums.com!
Welcome to civicforums.com.
You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to start new topics, reply to conversations, privately message other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join civicforums.com today!
We had the timing belt and water pump replaced about 2 weeks ago for routine mtce. The other night the car started running really rough, the engine light came on and when the hood was opened the exhaust manifold was red. Next morning you could see a very small crack in the ex manifold. I was told it was likely the cat clogging so I replaced it and the car ran fine on a 5- 10 mile trip. My son jumped in the car after it had been off for a couple of hours and in about 1/2 mile the same problem happened. I haven't looked at it to see if it cracked again, waiting for first light. Could it be a bad O2 sensor? showing
sortsa77
To remove this ad, register today for free or log in if already registered!
Sponsored Links
To avoid seeing this ad in our forum please register at CivicForums.com
By joining our free community you will have access to post topics, respond to polls, upload content and access many other special features.
wont be a bad o2 sensor, could be clogged exhaust from the cat going bad, if the cat went bad.
He said that he replaced his cat and came back with the same problem. I was just saying as a side note his O2 sensors more then likely burned out after words as well. The only thing that I could think of is that the O2 sensor went bad which could have cause a lean condition (I know it's suppose to go in to Limp home mode and run 14.7 a/r ratio) Purphase a lean condition caused higher exhaste temps which turned the manifold red?? These are all just quick thinking so hopefully you figure it out.
