i cant seem to get spark says there is an crankshaft sensor code . but its new???

no problem just routine maintenance

It seems to make the motor click and then lose power.

what tools are needed ?

Seemed to fixed problem but then started doing the same thing. Any ideas what to try next.

can't get replacement rear a/c lines. the original lines rotted through over the rear axle. the replacement lines are in 3 sections, but can't get all 3 sections.

Where is the low side AC service port on a 1998 Chevy Express? Do I add the R134 with the engine on or off?