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BR3W CITY · 06-20-2011, 08:03 PM

Thanks Frenchie!

Looks like my issue is the TAC module and pedal. I purchased an 06 (all plastic) set.

BUT because I'm running an 03 motor and 04 pcm (just found this out lol), I need to match the TAC and pedal. So an 03-05 pedal is in order. The newer style TAC uses 2 potentiometers to gauge position; one that reads 0-10v starting at 0, and the other reading 10-0v...starting at 10. This acts as a failsafe, but the extra signal confuses the older style TAC module. It sees the voltage change and triggers the u0107 code, putting the truck into limp mode. This is why is revs once, but immediately loses connection. A VERY nice member on ls1tech has agree to ship me the new pedal asap for my old one, so this problem should be solved shorty. I will post pics of the update soon.

I have also started a fully welded header back 2.5" custom exhaust, with Flowmaster straight through "mufflers" **cough ** resonaters **cough**

I have a little plan for the exit....but thats a surprise for now.

06-20-2011, 08:03 PM	#77
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: Br3w City's Project omgwtfbbq Thanks Frenchie! Looks like my issue is the TAC module and pedal. I purchased an 06 (all plastic) set. BUT because I'm running an 03 motor and 04 pcm (just found this out lol), I need to match the TAC and pedal. So an 03-05 pedal is in order. The newer style TAC uses 2 potentiometers to gauge position; one that reads 0-10v starting at 0, and the other reading 10-0v...starting at 10. This acts as a failsafe, but the extra signal confuses the older style TAC module. It sees the voltage change and triggers the u0107 code, putting the truck into limp mode. This is why is revs once, but immediately loses connection. A VERY nice member on ls1tech has agree to ship me the new pedal asap for my old one, so this problem should be solved shorty. I will post pics of the update soon. I have also started a fully welded header back 2.5" custom exhaust, with Flowmaster straight through "mufflers" cough resonaters cough I have a little plan for the exit....but thats a surprise for now. __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD Last edited by BR3W CITY; 06-20-2011 at 08:03 PM.