Jim_PA

iTrader: (8)

I'd like to try that tac module in mine! Can you tell me all the numbers that are on it?

BryanD

the tune can fix it. because earlier this week I was turnkey'ing a 2005 L33 and it had the standard problem. I already had a 2006 L33 tune that was an upgrades OS done so I did a write entire flash. so put the 2006 tune on the 2005, and the pedal throw was then correct.

I will get you the numbers when I get to the shop later.

Jim_PA

iTrader: (8)

Yeah, that's kind of my problem right now. I have my tune customized for 12v+ AC request (instead of serial data), and I'm up to COS3 with EFI Live. I guess if I found a tune file that worked properly with my pedal and tac, I could probably segment swap the AC changes???

There's a bunch of 2003-2006 van/truck/avalanche tune files over on holdencrazy for efilive. I could just start downloading and flashing them all to see if I can find one that works.

Would be very time consuming though!!!

BryanD

you mentioned "12v+ ac request (instead of serial data). this is a feature i wanted to use for offroading to be able to bump the idle up when using the a/c compressor for air, and played around with. but quickly realized the ac is controlled by the BCM. how did you get it be "12v+ request"?

Jim_PA

iTrader: (8)

C2 Pin 17 is the 12v AC request signal wire for an 04 express van. I had someone modify my tune to use that instead of the serial wire (I'm assuming it was a segment swap).

I imagine you could acquire an entire tune file form an 04 express van, write entire, and you'd have similar functionality???

BryanD

interesting! but, well, no - a write entire wouldn't work. an 04 express van is DBC, which is completely different tune/os. it was a segment swap then. it is my understanding that all the DBC engines used 12V+ ac request, but when they switched to DBW on everything BUT the vans in 2003 the BCM took control via a serial data link. the vans stayed DBC through 2005 i know, maybe longer (which i find odd).

BryanD

with tune OS = 12587811

TAC 12588923, (can't read number on pedal) gave me 100% pedal = 50% throttle blade. the pedal is the metal adjustable short throw style.

TAC 12590008, PEDAL 15107594 gave me 100% = 100%. this pedal is the short throw plastic one.

TAC 12588923, with LARGE THROW NON-Adjustable metal pedal also gave me 100% = 100%

So, still somewhat mysterious IMO. so for me the same tac module produced different results depending on what pedal used. sounds like the pedal sensors must be different then. unfortunately i can't read the numbers on the pedal sensors.

Jim_PA

iTrader: (8)

Thanks, ill check my numbers and see what mine does. Id like to get a properly working pedal before I finish the new project.

Gadgetized

iTrader: (9)

For everyone that has been having this problem, what codes are you getting?

Jim_PA

iTrader: (8)

None for me