Swapped a Gen IV 5.3/4L65E into a 72 C10 2wd pickup. Had harness done and ECM/TCM modules flashed with what they called a 'performance' tune. Im assuming this was a blanket tune that 'worked' for these engines and transmissions. Now, it starts, idles and drives ok. But it does not have near the snap and it smells very gassy. Im hoping someone can point me in the right direction on what would cause these behaviors. I've attached a short scan/log and the current tune. The only thing I've done is taken out 75% of the torque management but it doesn't feel that much different, still wont do a burnout from a stand still!? Also, this is a completely stock engine from a new body 2007 Silverado. Only modifications is a CAI and headers.
Thanks in advance!
Eli