I am going to purchase a scan tool was thinking of a snap-on mt2500 red brick so I can get some info from my 94 gmc 350 tbi. if im gonna spend the cash I figured I might as well get one I can use on...

Will check waiting on a scan tool I ordered to give some real info

thanks carcaper will get that checked out and post what results i get. Lionelhutz i will wire one in and see what happens i orignaly bought a 4 wire but didnt hook it up cause the harness only had...

yes vacum solenoid is running egr and is connected electricaly.
o2 sensor is located in the passenger header collecter
my bad lionelhutz just spaced out to answer that tried uploading a pic of my...

actualy was a help i knew it disabled some sensor just didnt know wich now i will replace my map sensor and check again. and to the earlier coment the o2 sensor is a 1 wire unit

maybe im wrong with what i thought was the egr. this is whats hooked up on the top left of the motor first the esc module then another sensor getting vacum from the tbi, it has a vacum port goint to...

Egr valve is connected and seems to be working and not plugged if I squeeze the diaphragm and hold it it kills the engine

The original truck didn't have a smog pump or really any other smog stuff on it.
I did put headman headers, dual pipes with flow master mufflers

Nothing has been changed as far as the injectors or internals it's a bone stock 350 out of a 94 gmc Sierra my dad bought brand new in 94 with 4 miles on the odometer. I was given the truck and ended...

I swapped a complete 94 tbi 350 and nv4500 from my daily driver when it was totaled into a 1973 k5 blazer. I replaced the chassis harness and added a painless tbi harness. After install engine fired...

Also using ecm 16196396 and have a 1227747 on hand tried both. engine acts the same with both

i have been working on a 73 k5 blazer that i put a engine and trans from a 94 3/4 ton chevy tbi 350 with a nv4500. i replaced all wiring with a painless wiring. i get the truck to fire up and idle...