Hey all,
My engine is throwing primary O2 sensor and Fuel pressure sensor codes. The engine runs fine throughout the entire RPM range. It has the 98 LS ECU. Do I need a 96 or 97 ECU for this setup?

Thanks for any help on this!

 

You have the correct ecu. I would check all wiring and check all vacums on the evap canister.

 

Thanks,
I have been told I would need a 96 or 97 ECU. I will check the evap canister.

Earful