92 2wd blazer, Vortec injection.....Truck runs fine, not missing but just wont pull at all, very slow to rev.
It acts as if the convertor is clogged, but its been removed and exhaust is flowing very well 100% sure.
I checked the fuel preasure and it holds 50 to 60 lbs.
Spider injector was replaced 2 or 3 months ago.
The check engine light is not on, I checked codes and it throwed me 43 which is knock sensor.
Im at a loss..............
Open to suggestions.
What the hell is wrong with the blazer???
Im pretty good with engines, built a few and work on my own stuff....this thing belongs to my daughter, Ive never fooled with a vortec and I think the problem lies there ( But Im not sure).

THANKS !!
Wire

 

Clean your iac valve on your tbi

 

Worth a try...I will clean the EGR as well.....
What is wierd, it dont miss a lick, and wont pull a greasy string outa cats ***.
She cant drive it....its that bad.

Any more suggestions ???

 

uhh try those 1st ill think of some more

 

After checking and cleaning IAC and EGR, no change !!
HELP !!

Just for the record. the IAC is idle control, if its bad...it wont idle, otherwise will run just fine.
Cleaning the EGR offered no power gain at all.

Help !!

 

Since I got all the great responses, I took the POS to the garage, when I get news I will enlighten all you guys............

Thanks a bunch !!