- Jul 22, 2012
- Orlando Florida
Cruiser is in the shop for trip ready but will send pic of ecu. What I do know:
-GM E-Rod crate LC9 with all components out of 2014 Yukon new.
-Got home to Texas and deleted secondary 02 sensors
-Retune with new engine spec air sensor and confirmed intake setup correct GM engineering
-LS shop hooked up computer and downloaded GM performance file specific to the purchased engine
-Second shop LS shop confirmed download was correct all data was within tune from first shop with fuel, air short and long term fuel, temps and dyno performance were spec
-Both shops build all the GM engines and both talked to the GM hotline to get data for my setup. Both confirmed the program was correct for my setup. There was 1 TCB to the ECU but didn’t apply.
-Your #3 they did the setup reset when the switched from closed to open loop. Second shop confirmed the 1st shop had to correct.
-The issue with the closed loop and 02 sensors is the way it was tuned, closed loop is when I got to about 5k feet limped on me. The shop I ended up at in NM said the tune setup for closed loop with 4 sensors the map wouldn’t adjust. That the previous owner never knew this because he stayed at sea level. Why it ran rich, loaded everything up on plugs etc. and on and on.
I’m trying to be as transparent and above my pay grade at this point. I think my issues overall is I can’t get 1 shop to say we will fix this if we break the bank.
Gotcha. You have a E38. Now that you are writing all that out it is sounding like you took all the right steps... with all that that's above my knowledge as well. Not sure why it wouldn't work at elevation if it's a stock tune file, people drive their Silverado's and Tahoe's all over the place. Sorry you're having to go through that, it can be very frustrating. Most shops are reluctant to touch something built by someone else out of fear of being blamed for future issues - myself included