Yesterday after a extended period at 75 mph on the freeway. I pulled off to get gas and all of a sudden my blazer was idling at 1500 rpm's... So i searched the forum and found out about cleaning them but my question is should the pintle move in and out freely? I sprayed mine down with carb spray and wiped down the seat but couldn't make the pintle move at all.... Is mine froze up??

95 cpi 4.3 blazer auto 4x4

Thx all