Air Fuel ratio not hitting target ECUTEK

[Yetti]

Can't seem to figure out why the engine will not hit near target air fuel ratio at WOT. I changed the Fuel map and moved "engine load limiter #1" and "engine load limiter #2" out of the way. Is there another fuel table or load limiter that I do not know of?


Tuning with ECUTEK, car has intake, full exhaust and is running on 93 octane

[steve99]

Answer is likely "car has intake"



intakes often cause tha mas air flow sensor to read incorrectly amd you need to recalibrate the mas air flow sensor scaling to work with ghe intake.


The maf is one of the primary sensors and effects fueling but also the load calculation that determines almost everytnig the ecu does so very important to get maf scaling correct or move to hybrid speed density

[steve99]

also note that stock 02 sensor scali g will only read to 12.1 afr max rich


that will be your next issue


and if your running petrol that afr target looks lean even if its NA

[Yetti]

My bad forgot to include there has already been some MAF scaling work and it is pretty close at idle and cruising (within a few %).

[steve99]

Originally Posted by Yetti

My bad forgot to include there has already been some MAF scaling work and it is pretty close at idle and cruising (within a few %).

You do both open and closed loop maf scaling ??

what intake is on car ??


is you maf scale fairly smooth if you graph it


wgen you add racerom it uses racerom load limiter table can you see that under racerom maps ?

[Yetti]

Grimmspeed intake, it is the same diameter as stock and close to stock MAF scaling. The Maf scale is a smooth curve if graphed. This was with Racerom 12.1 and I didn't know there was a racerom load limiter I will check that in the tune.