jbresee

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

triple88a

iTrader: (2)

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

jbresee

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?

hustler

iTrader: (6)

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

wayne_curr

iTrader: (8)

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.

triple88a

iTrader: (2)

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?

albumleaf

iTrader: (7)

Warmup enrichment.

TrickerZ

iTrader: (6)

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.

jbresee

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

TrickerZ

iTrader: (6)

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

triple88a

iTrader: (2)

and its lean only between 160 till about 200ish?

jbresee

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

Braineack

iTrader: (62)

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

TrickerZ

iTrader: (6)

+1

jbresee

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.