by Lake_v2 » February 24th, 2012, 7:39 am
If you need help ive done two tbi conversions, one pre smog, and one smog legal.
The only difference between the the presmog and smog legal is the use of the speed sensor signal in the ecm. To not use the speed sensor signal, you have to reprogram the ecm to think the transmission is in neutral at all times so that it doesnt look for the road speed.
The other question is what kind of spark control are you using? Are you going to use the ecm to control spark with a gm style distributor controls or use a stand alone distributor(hei)? If using an hei, you have to get a second resistor in place in the harness to fool the computer.
If you look at Affordable Fuel Injection's website, they have diagrams and instructions of what is used for non smog. Oh and if you decide to use their harness it was well worth it to me on one conversion, was simple and much cheaper than Howell.
"Whitesnake"