LMM: 2007.5 - using one of the DSP positions as a high idle

[02CCSB]

Playing with a buddys truck & want to make one position a high idle.

On LB7s I would just raise the throttle based injection qty & voila.

LMMs I'm not as versed. I'm thinking Pedal Position & Torque Based Fuel, but I'm leary of changing the "0" row?

 

[JoshH]

Change the zero row.

 

[02CCSB]

On only the torque based fuel, correct?

Reason I ask is the EFI warning that says not to change the pedal position & something in the back of my tiny brain recalling a P0606?

 

[JoshH]

I did it with the pedal position to desired torque table. It never set a code, but I didn't try driving it on that setting. It only idled.

 

[02CCSB]

Ah, OK, that makes sense.

Can I ask what numbers worked for you?

 

[JoshH]

I used 150. I set it from the 0 TPS row all the way until the next row up is bigger. In other words, if a row is less than 150, I set it to 150, and I stopped when the rows started getting bigger than 150. I did that from the 600 RPM column over to the 1200 RPM column (the 1400 RPM column stayed the same as it was originally). That made it idle a little over 1200. If you want it to idle higher, just go over further.

 

[THEFERMANATOR]

Can you wire the LMM like previous trucks and use the crusie switch for fast idle? I know it works on LB7's, have heard others do it on LLY's, and even read about people doing it on LBZ's. Didn't know if LMM's did it or not.

 

[02CCSB]

So like the attached?

And no changes torque based fuel?

 

[JoshH]

So like the attached?

And no changes torque based fuel?

Yep

 

[bluessmax]

I have done it a similar way and say 1 out of 20 trucks or so won't cooperate. The majority do... But some don't.

 

[02CCSB]

very very much appreciated gentlemen, I will try it later on this week and post up the results.

 

[rgullett83]

Can you wire the LMM like previous trucks and use the crusie switch for fast idle? I know it works on LB7's, have heard others do it on LLY's, and even read about people doing it on LBZ's. Didn't know if LMM's did it or not.

Not for sure if they can. But I added it via the dsp on my LB7, the high idle with the cruise switch would only work about half the time.

 

[jwrkansas]

Ive done it the exact same way josh was saying on an lbz and it worked well. Screenshot looked alot like yours.

 

[CDR]

been trying this for months with no luck I'll have to try it with 150 in the column thanks!