So this is the story i got. gm motor and stand alone harness out of the box installed into a jag. installer put a 3" intake tube on it. and sent it out for tuning. the tuning guy said the intake was to small and did some sort of tune on the engine. i think he was trying to compensate for the intake. it runs bad mostly after it warms up. i have a new 4" intake to go on it. this is total new to me. first time trying this. i have been a gm mechanic for 15 years. i will attach my tune file.
Jag.basetune.hpt