ok...i have a weird jerky hesitation at cruising speed....doesnt matter what rpm or speed or gear...it only happens when i am trying to go at a set speed...i can watch the a/f gauge drop off the lean side and either i give it gas or get off the gas and it clears ..till i try to stay at one speed...is it a ecu limp mode, coils, injector or vaccume leak or none of the above?

 

If your car is able to boost more than 2 psi, then your not in limp mode. If it doesn't boost at all in any gear, it is infact in limp mode and you should pull the ECU code and find your problem.

Hesitation usually involves the electrical system. I would check and clean all your grounds. Do a search for grounds.