Hey guys was getting a pending code p0101 blazer couldn't go faster than 40km replaced the mass airflow sensor still no power and pending code is back.. kinda stumped can't hear any vacuum leaks, new cat new 02 behind the cat. Ok so Just cleaned the throttle intake and unplugged the T.P.S.
and it does run and shift smoother can get it up to 70 80km ,So guess I should replace that sensor tomorrow, Well did the tps sensor and no change ..So took it to the garage cant go over 20kms.

 

I know its been a while but what did the shop say or do?

 

ended up being the pre cat, replaced and all is well

 

sorry i should also have stated that the maf was changed and the intake cleaned as well,
not sure if my precat actually had anything to do with it but maybe just a coincidence,
this was the second precat that i did thinking maybe the first precat had a flaw