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IROCThe5.7L 09-16-2019 03:28 PM

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!

Orr89RocZ 09-17-2019 06:49 AM

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

IROCThe5.7L 09-17-2019 08:39 AM

Re: Rich open loop idle
 

Originally Posted by Orr89RocZ (Post 6330374)
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

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.

Orr89RocZ 09-17-2019 09:41 AM

Re: Rich open loop idle
 
Could be. How the plugs look

IROCThe5.7L 09-18-2019 03:54 PM

Re: Rich open loop idle
 

Originally Posted by Orr89RocZ (Post 6330409)
Could be. How the plugs look


Rich. But that was before I dialed in my closed loop idle which was always rich. That's a good idea. I'll pull a plug this weekend.


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