I'm having an issue with taking off at low RPMs. Whenever I take off slowly, under 2k RPM, the car sputters and doesn't want to move. I have 1000cc injectors and the logger says they are scaled down to -11 at low rpms. My wideband reads about 10.? through 17-19.?. I'm not sure how I can fix this. I have ecuflash and mitsulogger, I just don't know where to start tunning it. I have my ECU ROM downloaded on my laptop and a few logs if anyone wants to look at them to help me out a bit.

Any help would be great. Thanx


P.S I'm new at tunning and all that, but I'm a fast learner. Thanx again

 

I imagine the first thing people are going to ask for are logs, you might as well post them now, haha.

 

I'll try to post something when I get out of class. I'll run a log when I go to lunch, the top speed I can go here is 35, so it'll be small. What should I log so I can be helped?

 

what do you mean they are scaled down to -11 at low rpms? is this your stft or ltft?

 

I have no clue what stft or ltft mean... I forgot to mention, I'm new at this tunning stuff.

 

short term fuel trim and long term fuel trim (either low, med, or high)

 

Roger that, the fuel trim at low is at -10, mid at -3 and hi at 0.
One thing I did see while I was fooling around with my ROM, was that the accel enrich drops dramatically between 2000 rpm to 2500 rpm. The numbers drop from 1.12 to 1.0 then picks up again to 1.12 at 3000rpm or so.
I compared it to a stock map, and its the same thing... Now I ask, should I adjust the numbers between 2000 rpm and 2500rpm to match the others, or should I be looking at something else? I'll try to post the graph and numbers for that when I get back to my hotel room. Any help would be appreciated.

 

ive never messed with the accell enrichment

what are your injectors scaled to?

 

to 813, they're 1000cc.

 

Here is a small log of a 3rd to 4rth shift. Let me know if anyone can help. Thanx

 

I was reading some more and I came across some good info and stuff. But that info, throws my injector scale a curb ball. My ROM says:
Injector scaling 886
The injector battery Voltage is as follows,
Battery voltage--ms
4.69 3.312
7.03 1.680
9.38 1.152
11.72 1.008
14.06 0.888
16.41 0.552
18.68 0.240

And the stock ECU ROM I'm comparing it to (just to see the changes) reads as follows;
Battery voltage--ms
4.69 3.312
7.03 1.680
9.38 1.032
11.72 0.672
14.06 0.432
16.41 0.264
18.68 0.144

The numbers in red are the same as mine, and I have 1000cc, I know how to fix it, but I don't know how to fix it. Know what I mean? How do I find the right ms numbers for my size injectors?

 

Fusion.

Read page 5 of the massive injector scaling thread, you want to look at l299gst (wrong I know) - eric's post on how to tune injectors.

Get your fuel trims correct first.