alright i have a 89 hatch with a d15b7 with a pm6 ecu and every time after about 10
minutes of driving, the check engine light kicks on and it throw the o2 code and runs likeshit, ive gotten 2 brand new o2 sensors and ive even hard wired it to the ecu, i even
checked the pin in the ecu plug and its in idk what else to do any suggestions would
be appreciated

 

It sounds like your O2 sensor is working and is reading emission gases beyond what the ECU can adjust for. It may be a timing issue. Check your cam timing and your ignition timing. Has anything been done to the car lately?

 

all the timing is dead nut thats what i dont understand

 

Did this just start out of nowhere, or has something been worked on?

 

i think he's talking about igniton timing if it's late say 12-0deg before tdc the fuel won't burn completely and make the o2 throw the code corect timing is 16-20 before tdc for the stock d15b7

 

Ok Ill Try That So How Do You Do The Ignition Timing Can Any One Give Me Steps On How Going About Doing This Any Advise Would Be Appreciated??

 

Ignition timing= Timing gun
Cam timing= Remove cover, set at TDC, check marks to head on cam gear.

Cam timing has to be right before you set your ignition timing.