Bad ECM cause emissions failure?
Thread Starter
Burning Brakes
Joined: Nov 2004
Posts: 1,107
Likes: 0
From: RI
Bad ECM cause emissions failure?
I've recently swapped to heated O2's due to long tubes. I thought I needed to do so because the left drivers O2 MV reading was slow to change. Not to mention, the engine went in and out of closed loop. After installing new heated O2's, there was no change. Even swapping the heated O2's themselves, no change.
Is this an ECM problem?
Is this an ECM problem?
Thread Starter
Burning Brakes
Joined: Nov 2004
Posts: 1,107
Likes: 0
From: RI
I have them powered off of the 12v fan relay (power source used for the electric water pump. I've followed the instructions from this website.
http://sethirdgen.org/HO2S.htm
Bought the same sensor and connector. I understand that the O2 sends a signal to the ECM to adjust fuel mixture ratio. However, if there is a problem with the ECM, would it alter the MV reading or just not read at all? It is a remanufactured ECM.
http://sethirdgen.org/HO2S.htm
Bought the same sensor and connector. I understand that the O2 sends a signal to the ECM to adjust fuel mixture ratio. However, if there is a problem with the ECM, would it alter the MV reading or just not read at all? It is a remanufactured ECM.
