1984 no cat effect on o2 sensor?
Thread Starter
Racer
Joined: Aug 2014
Posts: 269
Likes: 4
From: Bossier City Louisiana
1984 no cat effect on o2 sensor?
My 1984 corvette does not have the air pump and all the tubes on each exhaust manifold have been welded shut. Plus all the plugins for that part of the engine management are unplugged too ( only 2 if I remember correctly ).My car does not have a cat converter either. I was wondering how much of an effect of that loss of air being pumped into each exhaust manifold affects the tuning of the o2 sensor. I know there is only one o2 sensor on the driver side but it was a question that popped into my head the other day. If there is any affect, would a different o2 sensor help with the self tuning, correcting the air/fuel ratios. Seems like it might run a bit richer without that extra air to get the exhaust a little hotter but that may be a wrong assumption.
Thanks
Russ
Thanks
Russ
Le Mans Master
Joined: Aug 2017
Posts: 6,942
Likes: 1,490
From: New Jersey
The O2 sensor is going to shoot for stoich no matter what so it'll compensate still. I wouldn't be terribly worried about it honestly. A stock 84 computer is so slow it probably really can't see the difference.
Team Owner
Joined: Jul 2004
Posts: 28,474
Likes: 3,291
From: Hartford WI
IDK about an 84 but if the O2 sensor is nearer to the manifold, my thought is it shouldn't matter. My reason is that before the O2 sensor gets to temp, the air is being pumped into the manifold and it won't matter. When it gets to temp, the air is going to the cat which won't affect the O2 either.
Thread Starter
Racer
Joined: Aug 2014
Posts: 269
Likes: 4
From: Bossier City Louisiana
True. I appreciate that information. I knew the computer was slow but it was something I wasn't sure about and the lack of air being pumped into the exhaust causing it to be hotter for the o2 sensor where mine wasn't. It runs pretty good and gets decent mileage. Would a cat converter work on my car without the exta air pumped into the cat like the stock system was set up to be?
Le Mans Master
Joined: Aug 2017
Posts: 6,942
Likes: 1,490
From: New Jersey
True. I appreciate that information. I knew the computer was slow but it was something I wasn't sure about and the lack of air being pumped into the exhaust causing it to be hotter for the o2 sensor where mine wasn't. It runs pretty good and gets decent mileage. Would a cat converter work on my car without the exta air pumped into the cat like the stock system was set up to be?
Thread Starter
Racer
Joined: Aug 2014
Posts: 269
Likes: 4
From: Bossier City Louisiana
Thanks
Russ
