codenamezero

Car 07 Fit, Automatic 5 spd, 99.2k KM, consuming a whopping 10L/100km (worst than my integra 8.7L with s300)... car has random misfire at idle, car is COMPLETELY STOCK with K&N drop-in filter. Car is second hand, problem begin to happen about 4-5 months ago.

Stuff i've tried so far:
- Adjusted valves
- New spark plugs
- Cleaned the ground spots (but ground wire still corrode, like tons of green stuff inside, want to replace it with my 1GA but can't find copper ends yet)
- Tried the dielectric grease at the boot, applied inside and outside (should i apply it on the entire COP??)

I want to exhaust all my options before throwing down 250-300$ for new COP...

Please help.......

kp

Coils are only $100 or so, who is quoting you $300? You don't need to replace all 4, just replace the one (or two) that is misfiring. Change out each coil with the new one until the problem goes away.

I had a misfire and bought one coil to fix it, just switched out each one until the problem was fixed. Good luck!