Can not richen AFR
May 26, 2013, 08:34 AM
#1
Newbie
Thread Starter
Join Date: Mar 2013
Location: Thailand
Posts: 3
Likes: 0
Received 0 Likes
on
0 Posts
Can not richen AFR
Hi everyone. The car is Evo 9 JDM. Rom id is 88570008 with Tephra 5.1.
Everything works well except that AFR does not follow what defined in the high/low octane fuel map. This happens to the alternate map as well.
I tested by putting 7.4 to every load/rpm cell and the car idle like crap. This means that I am modifying the right table/address.
However, when tuning the car with some boost, the AFR does not go down. I also tested by putting everything starting from load 100 - 200 to 7.4 but the actual AFR (reading from MTX1) was some where in 13s.
What i found out is that when I logged the target AFR (AFRMAP) from evoscan, the target is something in 12s which i supposed to see 7.4 as my map is all set to such number.
Any idea where else to check? Attached is the bin file. Please help..
Everything works well except that AFR does not follow what defined in the high/low octane fuel map. This happens to the alternate map as well.
I tested by putting 7.4 to every load/rpm cell and the car idle like crap. This means that I am modifying the right table/address.
However, when tuning the car with some boost, the AFR does not go down. I also tested by putting everything starting from load 100 - 200 to 7.4 but the actual AFR (reading from MTX1) was some where in 13s.
What i found out is that when I logged the target AFR (AFRMAP) from evoscan, the target is something in 12s which i supposed to see 7.4 as my map is all set to such number.
Any idea where else to check? Attached is the bin file. Please help..
Last edited by b36_e36; May 26, 2013 at 08:42 AM. Reason: add xml file
May 26, 2013, 08:33 PM
#5
Newbie
Thread Starter
Join Date: Mar 2013
Location: Thailand
Posts: 3
Likes: 0
Received 0 Likes
on
0 Posts
May 27, 2013, 07:29 AM
#6
Evolving Member
I would trust what merlin says
Did you have that problem before upgrading the fuel pump ? if you still have the stock one, I know it's a hassle but put it back
unless you plan on running bio-ethanol or 400+hp it's good enough
I don't know how it works on MAP equipped cars but on an EDM you have to re-scale the MAF to approach a 1:1 realafr/afrmap
values are completely different (richer) by default, ex : afrmap 11.5 realafr 10.3 even with no problems on the car, on a stock ecu you're constantly in the 9s they run very rich stock ><
p.s.
injector duty cycle should be moved down in the list and logged below pulse width for the calculation to work in evoscan I believe, it's definitely true if you use openport 2.0 autolog on sdcard, if you don't you end up with zeroes like on your picture
Did you have that problem before upgrading the fuel pump ? if you still have the stock one, I know it's a hassle but put it back
unless you plan on running bio-ethanol or 400+hp it's good enough
I don't know how it works on MAP equipped cars but on an EDM you have to re-scale the MAF to approach a 1:1 realafr/afrmap
values are completely different (richer) by default, ex : afrmap 11.5 realafr 10.3 even with no problems on the car, on a stock ecu you're constantly in the 9s they run very rich stock ><
p.s.
injector duty cycle should be moved down in the list and logged below pulse width for the calculation to work in evoscan I believe, it's definitely true if you use openport 2.0 autolog on sdcard, if you don't you end up with zeroes like on your picture
Last edited by Kakihara; May 27, 2013 at 08:30 AM.
Thread
Thread Starter
Forum
Replies
Last Post
Guru
Evo X Engine Management / Tuning Forums
16
Aug 13, 2010 09:59 AM