Have a 2001 4dr blazer lt. Threw code p0335. Changed ckp sensor, now when I accelerate tach goes crazy, engine pings and hesitates. Still have code p0335. Now showing p0171. Have replaced plugs, cap and rotor over past summer during normal tune-up. Just replaced thermostat and o2 sensor cylinder 2 bank 1.

 

You need to have a crank sensor relearn done after you change that sensor. Always no exceptions

 

How do you go about having that done?

 

Take it to a dealer or some one with a high end scan tool. There are a few places that do it do a search, if you dont wanna go to a dealer. Some dealer do it for free some charge up to 100 bux. Get that done will run like new

 

Thanks for your help. Have a great holiday!