b18civicEF

check valves you need 3+ I had 2 and mine freaked out. You could be leaning WAY out! I was too and mine would do the same thing, but I had the 8:1 fmu and 255 walboro. but as they stated it could be alot of other things. also plug gap, I have mine at .26 also check your cap and rotor. check that stuff and get back to us. post up pics of your setup.

whatupdohc

i got the car to run and stuff but when i hit second gear the cel coms on the makes great power i have a 38mm waistgate vented i was wondering if all the exhaust bypassing the o2 sensor would throw the code but one thig is its not in limp mode

Skaterdudz02

I would assume it's going into limp mode, depending on the amount of boost running and how many check valves you're using.

whatupdohc

it not limp i have 5 check vaels would the o2 sensor freek like that

Skaterdudz02

I wouldn't think it were the oxygen sensor.

I don't think you need anymore than three check valves.

It could possibly be the VTEC solenoid at the higher RPM range where you said the check engine light is coming on. I'm not sure.

Pictures would really help by now.

whatupdohc

i run a dohc zc and i think its the 02 not seein much of anything in boost when it bypasses the exhaust buy the waistgate