p.s. your scaling is incorrect. why don't you just call LSE or DB performace, you live in that area.

 

+1 scale the injectors a little smaller

 

I would honestly recommend doing some more reading here in the EcuFlash area prior to doing any more flashing of your car. Your injector scaling is no where near where it should be. Although you may be able to adjust idle through O2 feedback, you will still be way too lean at higher loads and have no way to measure that without a wideband. I'd recommend starting by reading the injector scaling thread and purchasing a wideband. This is not meant to be condescending or attacking, but is out of a real concern for you and your car. I would hate to see you have to start a "my engine blew up" thread.

-Paul

 

OK... have fun with that then (tuning without a wideband). FWIW, adding fuel IS tuning, regardless where you're adding it. The only way to know 100% is to get a w/b in there. Someone elses 10% more fuel might not be yours.

 

if you do some research in the search area for injector scaling you will see why your 750 injectors DO NOT want to be 750 on your ecu. that is the reason why you are having lean codes.

 

as politely as I can say this.. do yourself a favor and get some professional help with the tune. Dialing in massive injectors isn't for someone that's asking basic questions.

I could do it for you and you'd learn quite a bit since I explain what I'm doing and why I'm doing throughout the process, but if you're hell bent on doing it yourself I wish you luck

 

If you have larger injectors and you are getting a P0171, it is more than likely that your injector latency voltages are incorrect.

What are your fuel trims?

 

my fuel trims are in the 15-20%

 

Try to find out if something besides the fuel trims is causing the problem in the tfirst place

 

Your injector scaling should be about 15-20% less than the injector size. So your 750 injectors should have a scaling of around 600-635. This is just a rule of thumb and your car can vary. You also need to adjust your battery voltage injector latency table to get your fuel trim within +/- 5-10% from 0.

 

That would mean you are too lean. Which is probably why you are throwing that code. You need to adjust your injector voltage latency to get as close to +/- 5 or less as possible.

 

You do have a narrow band, that is the stock one the car runs and is in the turbo elbow, this is what the ECU uses to run closed loop.

The scaling issue would be with the MAF scale and not the injector scaling, here's a link to the MAF thread https://www.evolutionm.net/forums/sh...t=load+rescale

MB

 

I cant beleive you told him to do this.....Did he say he has an intake?
He gets the code because he didn't scale injectors right. Once that's done, latencies will need to be adjusted.

 

Yep your right, I mis read the OPs post about his injector scale, I thought he was saying he had correctly scaled for 750, not that 750 was the absolute value he had entered.

RedLanEVO, sorry for the mistake.

MB

 

that's cool. well anyways, i lowered the injector scaling from the 750 i put in earlier and i put in 650. so i checked my fuel trims and i'm getting withing 5% of 0...which is good. most of the time, the fuel trim stays below 5% usually around 1-2% and the check engine light is not on anymore!

ps. i'm checking it with my autoxray scantool livedata