So the past 2 days my check engine light is coming on. Heres the deal. I have an a/f gauge. Check engine light only comes on when the a/f drops all the way off the lean side and dissappears. Restart the car and it goes away. About 3 days ago I noticed the a/f gauge not reading rich like it almost always does. It stays in the lean even when I first start the car and that has only happened a few times but generally goes away after a nightof sitting. I changed the oil the other day and oil got all over the o2 sensor area on the exhaust. wouldn't think thats a problem but maybe who knows. Also stopped by autozone with the light on they hooked there machine up and it couldn't read. I have and OBD2-OBD1 harness conversion so maybe thats why. Any ideas? I am thinking bad 02 but just seeing what you guys thing.

 

First off, toss that a/f gauge in the garbage, its pretty much garbage, unless its a wide band.

Why don't you check the code yourself then go from there.

http://www.c-speedracing.com/faq.php

 

That is great info but if the autozone computer couldn't read it will this work. and if it does what car and year do I use? This is a OBD1 converted ecu.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CodenameAcura &raquo;</TD></TR><TR><TD CLASS="quote">That is great info but if the autozone computer couldn't read it will this work. and if it does what car and year do I use? This is a OBD1 converted ecu.</TD></TR></TABLE>

Yes it will work.

For the codes, go off what ecu you are running, even though obd1 and obd2 codes are pretty much the same codes.

 

I believe its throwing 2 codes. 1 for oxygen sensor like I thought. Its also looking like its throwing code 22 for vtec oil pressure switch. Now I was low on oil and it wasn't engaging a few weeks back but I refilled oil since then and I have no problems with vtec engaing. Do you think it was just because of the low oil pressure or could something be wrong with my vtec switch? I also have a VAFC just for controling vtec could that be making it throw that code?