PawPawtruck01
Member
Howdy yall. I bought my dream truck about 3 months ago. 01 Lb7 dually. Along with it, the dreaded "P0093" code, and limp mode mainly while going up a hill or towing. Lomg story short, after doing everything but injectors, "I was told they were done bot even a year ago" it STILL put me in limp mode. I done fuel lines, filters, bypass filter housing, FPR, FPRV mod, tuning, lift pump etc, still no luck...I was frustrated and dome some reading on the 'bugs" that the 01's have in the tuning. So, the other day I read about the BARO sensor, and what it does. It supposedly adjusts fuel trim depending on the readings it gets, and they can get wonky sometimes. I unplugged the sensor, and FINALLY, the actual rail pressure would keep up with the desired pressure..blew my mind. But, the baro sensor is tied in with the map sensor "boost gauge" and they didn't work. So, I made a splice in the oarngish/ red wire, and put it on a switch so I could cut the signal of it, but still have it plugged in and the baro gauge work along with the map sensor....works like a charm..with the switch off, the truck runs like it should, no issues, no limp, no de fueling, etc. Blows my mind why or how this worked, but it did! Maybe it will help someone with this issue. I will include some pics of what I done to get rid of the limp mode. Maybe a new baro sensor would fix it, maybe it's bad. Maybe it's "Maybelline" lol but it worked for me. And I'm leaving it ALONE! LOL By the way, my EGT'S are down also on average 100 degrees. And I'm running an edge tuner on tow mode, and using the monitor to watch parameters. I also have an analog boost gauge and pyrometer I installed. Hope this helps somebody. Much respect.
