TimZ
founding member
Joined: 25 Feb 2008
Posts: 120
Location: Dearborn, Michigan
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 Posted: Wed Apr 30, 2008 10:07 pm Post subject: Re: Unstable Idling AFR |
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| Asim R32GTR wrote: |
Hi
Im really having trouble with my idling AFR.... i can set the VE table so that it idle`s at 14AFR... then when i start and stop the car a few times.. or the next day it will be very rich... then i knock off a few points... then its to lean... and back and forth... Even if i drive the car hard then it will change idle afr`s.. 
I have the DR0 set at 3%.... weather is around 10 - 15C...
Help!
Asim |
I had a similar problem - it turned out to be that my Min Injector On-Time (MIOT) was set too low. The problem was that even though the injectors were responding to the small pulsewidths, it appears that the spray wasn't consistent. I ended up having to set my MIOT up to ~1.45 mS or so before the problem subsided, which is much higher than I would have guessed it needed to be.
What injectors are you using (flow, impedance) and what is your injector pulsewidth at idle when you are seeing erratic mixtures?
_________________
Information is not knowledge
Knowledge is not wisdom
Wisdom is not truth
-FZ, Joe's Garage
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