Which wire going to the ecm is the o2 sensored line in an 89 rs? I'm making a cc carb and want a "second opinion" from my gauge if i'm running lean or rich.

 

Hey Bro...


Not that the stock ECM for the LG4 had 'that' much to say from the factory to begin with, the last thing you want is something else trying to control the mixture (with it's solenoid), and ruining a properly tuned engine...

The CC quadrajet will run FINE without the help of the computer, and remember, with the CC.... you have to run the stock CC distributor.

It's not even worth it, if you're looking for the most performance out of you're car. Use you're stock CARB (re-tune it of course), and run a vacuum controlled distributor.

BTW.... if you want to monitor the AIR/FUEL ratio, Edelbrock sells an aftermarket piece (# EDL-6593), that plugs into you're original O² sensor's bung, and mounts on you're dash! This is the BEST way to keep track of you're mixture, what better way than while you drive?

 

welp, i actually changed the top end over to carb. manifold, carb, and distributer were major changes. i don't have ALL the info on completely changing everything, so i left a lot of cc stuff in and worked it with common college-level knowledge. hopefully it works out. any other trouble i should be expecting?

 

Oh yeah, so back the the start question. I just want to use my stock o2 sensor with my autometer gauge to see what the hecks goin on down there....

 

When running a CARB, it's imperative that you use a vacuum gauge to tune bro. After you're timing is set the way you want it, place the car in reverse (put a couple of bricks behind the rear wheels so she doesn't run away on you).

Take off the vacuum advance from the distributor, plug in you're vacuum gauge to the CARB, then start adusting the mixture screws....

Try to obtain the highest psi as possible, by turning both mixture screws clockwise.... and counter clockwise.

When the psi is at it's peak, and the needle on the gauge won't go any higher.... you're idle mixture is perfect, and you don't even need to know what's going on in there.

Go back in the car, take her out of gear... and put her in park. With the car still running (at idle), adjust you're idle screw. Lower it (or raise it, whichever is the case) to 750 RPM.

 

Thanks a bunch. Switching from Honda's to Camaro's wasn't exactly the easiest thing in the world......