hesitation worse when A/C on

[Kershaw]

http://www.r3vlimited.com/board/showthread.php?t=372569

Go through my thread here. I experienced the same issue.

[cory58]

Thanks Jeff! I'll text you when I'm ready to dig in again.

Cory

[jeffnhiscars]

If your foot is to the floor I'd suspect TPS. The only thing I can think of that the ac would effect is idle which is also related to the tps.

Other than that perhaps a flat spot in the AFM, vacuum leak, fpr or a bad injector.

Let me know if you don't have spares to swap in as I probably do

[cory58]

I'm trying to solve a hesitation problem on my Touring. Threads here on r3v have been helpful, but I haven't found the problem yet.

I noticed yesterday that the hesitation is worse with the A/C on, and wondered if that might help narrow down the potential causes.

Without A/C
Hesitation at WOT, at med to high revs (tach is non op, so don't know exact rpm). Seems to be getting worse over time.

With A/C
Hesitation much worse, at partial throttle and lower revs.

Parts replaced the day I bought the car
spark plugs
cap and rotor
air filter
fuel filter

First noticed the hesitation 5-600 miles after the tune up.

Parts replaced Friday that did not fix the hesitation
plug wires
coil

Any thoughts on the cause of the hesitation?

Cory