MitsuStyle - View Single Post

cman3000 · 05-30-2011

Well I figure my global should be -17.6 according to this equation, and the fact that PTE 880s actually flow 840cc (according to ECMlink wiki). I originally thought I had to compensate for the lower base fuel pressure in a 1g (37 vs 43.5 in 2g) after reading it in some thread, but I don't see anything about it anywhere else so I will stick with 17.6.

(450/(Injector Flow * .65))-1.0 = E85 Global

(450/(840x.65))-1
(450/546)-1=-17.6

I already adjusted that though, I think the source of my problem is the really low AirflowPerRev reading, it is around .13-.14 now. My car wants to idle at around a 12 afr. I did a boost leak test, held to 5 psi (all my crappy electric pump can pressurize it to) so I don't think I have unmetered air coming in.

What else could cause such a low airflow reading? Bad MAF maybe?

Edit: Also, could the ecu be putting itself in open loop during idle because of the low airflow readings?

05-30-2011	#3
cman3000 Colin 100m Running Champion! Join Date: Apr 2008 Location: U of M, Brainerd Drives: 90 Talon TSi AWD, 73 Datsun 240z w/Built L28 Posts: 244	Re: ECMLink Tuning Questions (Logs Included) Well I figure my global should be -17.6 according to this equation, and the fact that PTE 880s actually flow 840cc (according to ECMlink wiki). I originally thought I had to compensate for the lower base fuel pressure in a 1g (37 vs 43.5 in 2g) after reading it in some thread, but I don't see anything about it anywhere else so I will stick with 17.6. (450/(Injector Flow * .65))-1.0 = E85 Global (450/(840x.65))-1 (450/546)-1=-17.6 I already adjusted that though, I think the source of my problem is the really low AirflowPerRev reading, it is around .13-.14 now. My car wants to idle at around a 12 afr. I did a boost leak test, held to 5 psi (all my crappy electric pump can pressurize it to) so I don't think I have unmetered air coming in. What else could cause such a low airflow reading? Bad MAF maybe? Edit: Also, could the ecu be putting itself in open loop during idle because of the low airflow readings? Last edited by cman3000; 05-30-2011 at 01:47 PM..