Translator help please!!!!

[spendone]

Everytime I think I figured out how to use the translator, I end up proving myself wrong. I have the TMO logging software in a laptop. I also have an EGT. What are my basic points of tuning and what should I do to adjust them accordingly?? I orginally just tuned for knock but I was also told that I should watch my fuel trims. I would try to adjust my fuel trims but they never change. From what I remember my low trim is at 120, mid trim is at 80 and high trim at 100. I try to richen up the idle knob to bring it down, but nothing ever changes. I also tried with my mid but no luck there as well (leaning). They stay a steady line all the way across the board and never change. I just want to make sure its tuned decently so I dont blow anything up. Thanks in advance.

 

[DevilSperm]

reset your ecu, then go drive around and see what happens, the trims take awhile to move sometimes

 

[spendone]

Thansk for the input, I just gave it a run for about an hr playing with the trims. I cant sem to lean out my high no matter which way i turn the base (even though clockwise it lean on base) Its at 85%, I know rich is always better than lean though. I have the mid at 96% and the low at 99%. No knock on mid and wot. Some knock does pop up once ina while on my mid if I punch it in the middle of cruising, but like I said thats once in awhile, I get about 15 counts at the most. Any other peice of advice for the high fuel trim????

 

[DevilSperm]

you are using your base knob for high tuning? thats wrong if you are, the base should be set and left, then the tuning done with the idle mid and wot....also make sure you arent trying to tune the high with the wot knob...i have a similar problem except its my low trim...i cant seem to get it to richen up no matter what i do

 

[spendone]

Like I said I got the low and mids pretty close to 100, how do I adjust the high trim??? I fell like its sooooo imcomplete.

 

[domenico_169]

i am having pretty much the same problem, and i cant find help. i cant get my fuel trims to move at all. just a straight line all the way across.

 

[Budget90GST]

Another way to do it is to watch the O2 trims while you're doing a steady cruise (say 65 mph). Try to hold your speed and keep an eye on the O2 trims and see if they fluctuate between let say 85 and 115 percent. The key is that the mid point of the trim should be around 100 (i.e. 70-130, 80-120, 90-110 and so on). You can also log this whole trip and review the O2 trim at home. When I was setting mine I had all kinds of trouble because my FP solenoid was broke and my trims were never near each other. Fixed that and found all my leaks and now trims are always within 5 or so of each other. Hope this helps!

 

[DevilSperm]

i didnt even realize i screwed up my reply back in august heres what you do....set all your shit to 0, reset your ecu, go out on the highway and drive and watch your o2 trim, it should cycle around 100, like said above, once that is set, which adjusts the high trim you leave it...then tune your idle, let it sit and richen or lean whichever you need to do....then do you WOT pulls and adjust to whatever you are shooting for

 

[AL92]

In think small vac leaks will cause the low trim to read high and think bigger injectors also due to dead time.On my car though the mid and high always move together.I think there is something wrong maybe a boost leak type of thing or something if your high trim is rich and your mid isn't .And you should be able to lean high by leaning base.Wot affects wot not high trims and mid affect just off idle at light throttle not mid trim.
So if you are very rich at high then likely have some other problem to correct first.

 

[illeagle_talon]

An awesome website that should help you out a lot is fullthrottletech.com. Scroll down to about mid page and there is an entire forum that is solely dedicated to gm mafs on dsms. Also one of the smartest guys on this forum is a moderator there: kpt4321.

 

[domenico_169]

posted there a month ago, no one wanted to help.

 

[Mackzero]

Go to www.fullthrottletech.com/forums You need to read the MAFT tuning guide first, and do what it says to tune your car. THEN if you have questions you will be more likely to get answers. Also make sure your Fuel Pressure is where it is supposed to be before tuning and reset your ecu to reset trims.

 

[domenico_169]

i did exactly what you said. ill post again there soon, but ive gotten alot of help here though. wish it wouldt take so long for the fuel trims to change though, cause then i could just tune it on the dyno. would be so much easier, than driving around all the time.

 

[Mackzero]

Dyno tuning is for WOT tuning mainly. You use the dyno to get the best powerband you want. Just drive around and get the fuel trims close, then go to the dyno and tune your RPM/WOT settings.