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..

 

I'm no pro but you should log your injector duty cycle. Either your maxing out your injectors or your pump.

 

Thanks for input. Duty cycle are somewhere around 50s. Pump are brand new Sard 280 cc/min and fuel pressure are all okay.

 

fuel pump not going into hi-speed mode, relay fault.

 

Are injector scaling and latency tuninng required? Everything in the car is stock I.e injector, turbo and cam.

 

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