ARF CHANGE with SAME Bat Voltage and ECT, IAT

b20beast · Post by **b20beast** » Fri Apr 17, 2009 8:39 am

I have a problem with Consistant Idle ARF. At Idle around 850rpm The Afr Fluctutates The Battery Volt is the Same ECT and IAT Are the Same Goes 14.48-14.98 AFR

combz · Post by **combz** » Fri Apr 17, 2009 9:11 am

man..thats such a small blip in the afr..that happens for a split second..and its at idle or vaccuum..its nothign to worry about. there are other factors that could make that happen too

b20beast · Post by **b20beast** » Fri Apr 17, 2009 9:24 am

what are some other factors to consider? How consistant should the afr be?

greasemonkee · Post by **greasemonkee** » Fri Apr 17, 2009 11:15 am

occasional misfire and or ecu shifting timing to compensate -> afr twitch

Adam Hopkins · Post by **Adam Hopkins** » Fri Apr 17, 2009 11:25 am

You will never get it to be 100% rock solid. It is not Calvin's, eCtune's, or your fault. I have tuned vehicles on about 15 different types of software and I ALWAYS see small fluctuation in afr's at idle. Do not get me wrong, a small blip from 14.4 to 14.8 is ok, but if it is jumping a whole point or something more extreme then it is usually a compensation table you need to adjust.

b20beast · Post by **b20beast** » Fri Apr 17, 2009 11:34 am

thanks everyone

Post by **calvin** » Fri Apr 17, 2009 7:13 pm

that is good.