AdamD19DFK8
Senior Member
- First Name
- Adam
- Joined
- Jul 11, 2019
- Threads
- 5
- Messages
- 679
- Reaction score
- 376
- Location
- Maryland
- Vehicle(s)
- 2020 FK8 Type R, 2007 Civic Si Sedan
- Thread starter
- #1
Hi all, not sure if this would be the proper place to ask this, but my old backup beater, a 2007 Civic Si has been having misfire code issues for awhile. Random cylinder misfires and misfire codes on each individual cylinder. It's got 205k miles on it, so It could have any number of underlying issues. Ive already taken the liberty to replace the spark plugs and coil packs but the issue still persists. Driving the car it seems to drive fine. Though I don't have a good perspective of what it's power should feel like anymore since i've gotten really used to having ~400 ft/lbs of torque.
I've data logged some drives and nothing really sticks out to me, other than the ECU targeting an AFR of ~11.1:1 with the engine actually receiving anywhere from 13.5-14.7. I don't know whether to pull off the intake manifold and exhaust manifold/cat to see if the cat is bad or if cleaning the intake manifold out would do the trick. It could be possible a fuel injector could be bad, I looked at them without pulling them and there were no leaks at least.
I know this is a common problem with this car and was hoping someone had experience in narrowing down the issue.
Thanks
I've data logged some drives and nothing really sticks out to me, other than the ECU targeting an AFR of ~11.1:1 with the engine actually receiving anywhere from 13.5-14.7. I don't know whether to pull off the intake manifold and exhaust manifold/cat to see if the cat is bad or if cleaning the intake manifold out would do the trick. It could be possible a fuel injector could be bad, I looked at them without pulling them and there were no leaks at least.
I know this is a common problem with this car and was hoping someone had experience in narrowing down the issue.
Thanks
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