odd idle AFR - Tuning Forum

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odd idle AFR
Monday, September 20, 2010 5:31 PM
I have an odd thing going on with my AFR at Idle. when I first start up its in the mid 14s, after about 20 sec it starts going up and ends up in the mid 12s. ive done several reflashes and there hasn't been much of a change, still trying to idle in the 12s even though commanded is 14.2. car is up to temp and closed loop disabled.




Re: odd idle AFR
Monday, September 20, 2010 5:46 PM
What about off idle?



FU Tuning



Re: odd idle AFR
Monday, September 20, 2010 7:09 PM
pig rich too, new stg 1 cams and ss inj installed, using constant .13144



Re: odd idle AFR
Monday, September 20, 2010 7:26 PM
What is your Power Enrichment Multi vs. RPM set at?



FU Tuning



Re: odd idle AFR
Monday, September 20, 2010 7:34 PM
Cinny wrote:I have an odd thing going on with my AFR at Idle. when I first start up its in the mid 14s, after about 20 sec it starts going up and ends up in the mid 12s. ive done several reflashes and there hasn't been much of a change, still trying to idle in the 12s even though commanded is 14.2. car is up to temp and closed loop disabled.
Dave, Email me a log and the file in it.....





P&P Tuning
420.5whp / 359.8wtq

Re: odd idle AFR
Monday, September 20, 2010 8:22 PM
Screaming for Mercy!! wrote:What is your Power Enrichment Multi vs. RPM set at?


1.0 across the board





Re: odd idle AFR
Tuesday, September 21, 2010 6:15 AM
I have not looked at it yet. I wil when I get home. Try this. Throw it back into Closed loop and filter out any dfco or PE. Also, don't start the log until its gets to commanded Stoich of 14.7( closed loop active) . I have had to do this a few times due to this same thing. Just proves that there are more tables missing. This is why I want an actual Stoich command and modifier tables......





P&P Tuning
420.5whp / 359.8wtq

Re: odd idle AFR
Wednesday, September 22, 2010 10:02 AM
I want the idle and cruise command table too, for some reason my car thinks its a good idea to command 14.6 at idle and cruise in closed loop and command as low as 13.4 with cl disabled.


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Re: odd idle AFR
Wednesday, September 22, 2010 1:50 PM
Leafy wrote:I want the idle and cruise command table too, for some reason my car thinks its a good idea to command 14.6 at idle and cruise in closed loop and command as low as 13.4 with cl disabled.
I've seen it lower than that! BTW, I will take a look at your file tonight!





P&P Tuning
420.5whp / 359.8wtq

Re: odd idle AFR
Wednesday, September 22, 2010 3:58 PM
I did what you said and got positive results for a change. files are located here since this worked does this mean I will need to tune in closed loop on this VCM, or was just to get the idle tables to behave?





Re: odd idle AFR
Wednesday, September 22, 2010 5:52 PM
Cinny wrote:I did what you said and got positive results for a change. files are located here since this worked does this mean I will need to tune in closed loop on this VCM, or was just to get the idle tables to behave?
On these PCM's is a crap shoot. Its not technically the "correct" way to do it, but in all honesty, sometimes it yeilds the best results on these PCM's (and only these PCM's.... I plan on outlining this in the "how to"...

Leafy, I got your email and file. From what I can see, this thing must run rich as sh!t all the time. What size injectors do you have again? I am going ot send you a reply email with some pointers....



P&P Tuning
420.5whp / 359.8wtq


Re: odd idle AFR
Wednesday, September 22, 2010 6:43 PM
Ya can share the same info you emailing to them, im in the same boat as leafy.
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