Is getting higher and higher.

I'm uncertain which parameters to tweak in the warmup section to bring the AFR's back down.

My cold AFR's are up in the 17-18 range. Actually, I've been able to boost the % increase by water temp, but as I reach the top of that scale (160 degrees), I suddenly get very lean. I am idling at 14.8 - 15.0 once the car is really warmed up.

Any guidance appreciated!
Jim

 

17-18 range is very lean, 14.8-15 is richer than 17...

 

Yeah, I know that.
My post wasn't very clear.

As it's getting colder, the warm up idle is getting leaner (pushing 17-18). This acute as I reach the top of the warm up enrichment temp (160 degrees), but before I'm at full warm (172 ish).

Once fully warm, I'm bouncing between 14.8-15.00.....

Does that make more sense?

 

If you think 14:1 is lean, post up some high res shots of your meltdown

 

Add more fuel to your idle cells newb. This happens as the temps get colder outside. I have to adjust my idle every 2-3 days this time of year.

 

just curious what do you do once the car is warmed up? Do you lower the fuel? If not it would be running pig rich wouldnt it?

 

Warmup enrichment.

 

sounds like you need to adjust coolant related air density to use AIT. I had the same problem until I played with those settings. Now it stays around 13.5-14 all year round.

 

I'm not doing a good job of explaining the situation here.

I am using warmup enrichment. It works as expected up until I hit 160 degrees, then it goes very lean.

If I add fuel to the cells, I run rich when I am warmed up.

If I bump up the warm up enrichment percent, when I hit 160, it steps back and is lean.

I can post a log if that would help describe the situation.
Jim

 

so you're saying at 200* or whatever your operating temp is, the AFR is fine?

 

and its lean only between 160 till about 200ish?

 

Yes.. once fully hot, idle afr is 14.8 - 15 ish.

 

then it's your warmup enrichments. possibly need to tweak your AIT-based air density table.

 

+1

 

Cool. Thanks for the pointer. I'll fiddle with that and see it if helps.
I also picked up a wells tps to stick on it. I'm hoping that helps some of the other idle suckage.