Troubles of TBI Conversion
Sometimes I go really fast in reverse....haha, just kidding, its broken again....
A co-worker gave me one of these, I am very lucky to have such generous people around me
I also found a way to get an early style factor temp sender in the V8 block
Spoiler alert: this is a 350 TBI intake manifold with the now cleaned up thermostat neck on it (TBI temp sender to ECM as well as TEQ gauge Sender)
Here are most of the supplies I gathered over the past few weeks:
First snag (of many) The Transdapt 2208 adapter bolts up to a GM Quadrajet manifold, but it is restricting...
No big deal, I just had to go get a factory TBI manifold from my father(pictured above) then I noticed that one of the T-stat bolts was broke off, drilled, but never tapped, so I did all that to get it bolted on.
and I broke the factory oil pressure switch off after I installed the new manifold, but the guys at War Performance (where I got the harness) had already removed the switch from the fuel pump circuit, so I just put the TEQ oil press sender there....
Parts Run, for the millionth time:
So after taking a little longer to swap everything over than I thought.... I was able to turn the key, and boy was I disappointed... it did nothing, no fuel while cranking, I reversed the Airtex fuel pump that came with crappy directions and no Directional Arrow stamped or painted on it, and then it happened! Fuel shot all over the engine bay, on all the freshly painted surfaces...

So I had to re-re-rebuild the throttle body unit, actually I had to rebuild another housing because Kevin=hulk when very mad. Kevin Torque Screws...Kevin Smash...
So I fixed in, no leaks, injectors spraying...no spark. My timing light didn't work ( I tried it on the truck at idle and it had no flash) I pulled a plug on the cruiser to confirm and as I figured no spark. After about an hour of ringing out circuits with a test light and multimeter I retired for the night and gave it a fresh start in the morning. This is what I found.
Normal EST from that direction...but....
I may or may not have pushed a connector on with too much force...
after I straightened that out it started right up, the idle was rough and it pulsed, but I moved the Dizzy around by hand and tried to set base timing without a light, and tried to set base idle speed following this:
http://www.gmcmidwestclassics.org/Web%20pages/Tuning%20the%20TBI.pdf
But being that the timing wasn't really right I had to wait until i figured other things out.
I got it moving and realized that my MAP Sensor was counting in the wrong direction, reading 4-5VDC at idle and moving down with less vacuum... so I had to make another parts run, and after I relpaced it everything ran really well.
I set base timing with a light and went over all the other sensor/senders and it runs really well now.