OBD2 question
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Joined: Nov 2004
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From: Mountain View, CA
OBD2 question
So ive got a 99 si with a 98 LS engine in it, currently its got one O2 sensor down at the cat and an OBD2 to OBD1 conversion harness to the ECU. Obviously this can't pass smog, so I want to get it legit if its possible/reasonable.
From what I understand I need another O2 sensor on the top piece of the header (I need to replace the header anyway so its not a big loss), an OBD2 LS ECU and possibly a knock sensor, or did 98 have a knock sensor?
thx in advance
From what I understand I need another O2 sensor on the top piece of the header (I need to replace the header anyway so its not a big loss), an OBD2 LS ECU and possibly a knock sensor, or did 98 have a knock sensor?
thx in advance
Joined: Jul 2003
Posts: 28,282
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From: michigan
98LS ecu won't work plug and play. 96-98 = obd2a 99+ = obd2b. You would need primary and secondary o2 sensors and an obd2b to obd2a conversion harness to run the 98LS ecu. IIRC...somebody correct me if I am wrong. It's been a minute since I have delt with obd2 swap issues.