'94 Z engine hesitation?
I have a 94 z28, automatic, 150k miles, stock everything (as far as I know) except for K&N cold air intake and Borla exhast. It also supposedly has some kind of chip or reprograming, I just bought it 1 month ago. it has been running pretty good untill about a week ago when I ran out of gas (gauge is off) and filled up with premium (was running regular gas) and then I noticed that when it shifts into 2, 3 and sometimes 4th gear the engine seems to bog down untill you get past 2000 rpm. I hold the gas pedal in the same place and it takes forever to accelerate untill 2000 when it seems to take off a little more. when I get into it it hesitates(longer than normal) then seems to take off alright. any help? or suggestions? thanks, Lance