Rich open loop idle
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Joined: Jul 2001
Posts: 5,225
Likes: 70
From: Buffalo, NY
Car: 1988 IROC-Z
Engine: 427 SBC
Transmission: ProBuilt 700R4
Axle/Gears: Moser 12 Bolt / 3.73 TrueTrac
Rich open loop idle
Hey guys,
My car is tuned in closed loop. 6E. I always had a rich open and closed loop idle. I realized I wasn't being aggressive enough with my MAF table changes. I now have a high 14's AFR closed loop idle. But the car still runs rich in the open loop cold idle. I zero'ed out the "Open loop AFR Ratio % change vs coolant temp". It made a difference. But my cold open loop idle is still mid to low 13's.
I'm not quite sure what other table I just look at the lean up the open loop idle?
Thanks!
My car is tuned in closed loop. 6E. I always had a rich open and closed loop idle. I realized I wasn't being aggressive enough with my MAF table changes. I now have a high 14's AFR closed loop idle. But the car still runs rich in the open loop cold idle. I zero'ed out the "Open loop AFR Ratio % change vs coolant temp". It made a difference. But my cold open loop idle is still mid to low 13's.
I'm not quite sure what other table I just look at the lean up the open loop idle?
Thanks!
Joined: Sep 2003
Posts: 25,895
Likes: 429
From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: Rich open loop idle
Is there a open loop enrichment vs lv8?
also the open loop vs coolant should accept negative values
mid 13’s with cold coolant is fine imo
also the open loop vs coolant should accept negative values
mid 13’s with cold coolant is fine imo
Thread Starter
Moderator




Joined: Jul 2001
Posts: 5,225
Likes: 70
From: Buffalo, NY
Car: 1988 IROC-Z
Engine: 427 SBC
Transmission: ProBuilt 700R4
Axle/Gears: Moser 12 Bolt / 3.73 TrueTrac
Re: Rich open loop idle
Thanks for the reply! I figure mid 13’s were ok too. But it puffs a very small amount of black smoke at cold idle. I don’t know if it’s because my Wideband is a little off due to the large cam or what.
Thread Starter
Moderator




Joined: Jul 2001
Posts: 5,225
Likes: 70
From: Buffalo, NY
Car: 1988 IROC-Z
Engine: 427 SBC
Transmission: ProBuilt 700R4
Axle/Gears: Moser 12 Bolt / 3.73 TrueTrac
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