LBZ: Lbz not fueling

[GMC_2002_Dmax]

Check your ECT Sensor...........see if it reads -38 degrees.



To anyone who wonders why tunes are locked, its because I don't want you seeing how I do things

 

[Gmclbz]

buddy had an lbz with a similar situation and we had to max out a limiter table that you should normally not have to with this setup. I will look at what table it is

b0792?

 

[S Phinney]

Check your ECT Sensor...........see if it reads -38 degrees.



To anyone who wonders why tunes are locked, its because I don't want you seeing how I do things

Possible but he says it idles just fine. Bad ECT sensor should have noisy and erratic idle.

 

[Gmclbz]

Check your ECT Sensor...........see if it reads -38 degrees.



To anyone who wonders why tunes are locked, its because I don't want you seeing how I do things

I'll check tomorrow Tony, I think that was okay. Can't remember though, only looked at it 20 times or so lol...

 

[Gmclbz]

Possible but he says it idles just fine. Bad ECT sensor should have noisy and erratic idle.

Yes idle is fine and rpm will raise with pedal but won't fuel past 40mm3.

 

[Gmclbz]

Checked ect this morning and it read 7c on tech 2 which is 44f
I think so don't think that is an issue.

 

[Harbin_22]

Try to max out
B0792
B1186
B1192

 

[S Phinney]

Yes idle is fine and rpm will raise with pedal but won't fuel past 40mm3.

I know you can't check the tune since it is locked but some of the DSP staging setup could cause some crazy issues as well. Probably is not the problem but throwing out ideas.

 

[Harbin_22]

The truck that we worked on acted just like limp mode but with no codes and all sensors functioning properly. Maxed these tables and it hasn't missed a beat since

 

[Gmclbz]

Try to max out
B0792
B1186
B1192

B0792 was maxed out but the other 2 tables were not. I'm positive they weren't on my truck either. Maybe some of these pos trucks are pickier than others. I just adjusted those tables and will try it in the morning.:thumb:

 

[Gmclbz]

Try to max out
B0792
B1186
B1192

Maxed out all 3 tables with absolutely no change at all...

 

[x MadMAX DIESEL]

Does it work in 4low? What is it making for desired torque reference?

 

[x MadMAX DIESEL]

Maybe try it with the maf turned off. Is your maf reading correctly?

 

[07metallicgreen]

check for boost leaks maybe?

 

[Gmclbz]

check for boost leaks maybe?

It's beyond a boost leak, something electrical just not sure what.

 

[Gmclbz]

Does it work in 4low? What is it making for desired torque reference?

Haven't tried, don't think it will make a difference.

 

[x MadMAX DIESEL]

Haven't tried, don't think it will make a difference.

It may not and it makes it a pain to test. I was just wondering if your desired torque if giving the reference to command fuel... And 4low and high have different tables

 

[x MadMAX DIESEL]

What I would do is just watch and see what kinda torque your outputting, and turn off maf for the mean time

 

[JoshH]

What is your MAF sensor showing?

 

[Gmclbz]

What is your MAF sensor showing?

Voltage or grams?