Background:
VIII with stock intake, TBE, walbro 255 and MBC set to 22lbs(spike)EDIT: and walbro 255. Tuning with PLX wideband, ecuflash and mitsulogger.

Ive been trying to richen up my car from 6300+ because it goes from steady 11.3 up to about 6300 but then it slowly leans out to 11.9 at 7000.

My fuel tables have been richened up to mid 7's in the 180-200 load cells from 6500 up. I would think the car would be dumping black smoke,,, but the injector pulse width isn't even changing????

I thought that my car wasn't getting the table from my laptop but when i went and read the ecu, the table's were the same ones i wrote.

Thanks

 

what are your IDC's?

 

Might be the fuel pump. Sounds exactly like the problem JeffR had been having with his walbro and IX over a year ago.

Didn't have to do a re-read on the tables either. ECUFlash has a compare function which would have told you if it was the same map or not .

 

Sounds like a bad pump

 

hrmm if his IPW isn't changing then its not a fuel pump...

but it would be hard to see the change, he may be mistaken in saying its not changing...

 

Lack of install kit with said pump

 

sorry... i forgot to say i installed a fuel pump...i thought that was my problem, but it didn't change a thing.

 

my idc was under 90%

my pulse width at 6600 was 15-16ms about 82%

 

So you installed another pump and the same issue? Was this another walbro? Are you using 2 byte load? And you are sure that these load cells is where its hitting up high?

 

I had the stock pump in last week... I was having the lean problem, so i put a walbro 255

I really don't think its the pump. I think it is in the computer, because my pulse width isn't going up.

 

what is "2 byte load", im looking at the colum all the way to the right in mitsulogger "load" not "ecu load".

 

No you got confused I think when I said install kit. The $20 dollar kit that doesnt come with the pump.

 

This is 2 byte load:

https://www.evolutionm.net/forums/sh...ight=byte+load

I took a quick peek at mitsulogger (have it but don't really use it) but I'm pretty sure the one you are using is similiar to the calculated load in EvoScan which is a "guesstimate" load value. 2 byte load tells you pretty much which load cell the car really is hitting.

The reason I ask is because it could be possible if your not using that your just editing the wrong cells.

 

Yeah, you need the 2-byte load. 22 psi is probably closer to the 240-250 load range. Good luck.

 

Even though 11.9 is a tad rich by 7000 rpm (to me), the fact that you have no control over your fuel sounds like fuel regulation or supply.

Do you even have a walbro FP? Could also be fuel pressure regulator or FPR solenoid