1990 k5, stock tbi 350 The truck will not stay running. It has 10 psi of fuel pressure at the filter, the egr is fairly new and doesn't seem to be sticking, I tried a replacement module under the distributor cap, cleaned the IAC with carb cleaner, and tried a replacement TPS. It cranks much longer before firing before all this started. When it does fire, it stumbles and dies. If I give it some gas, it will load up, bog down, and die. I unplugged the map sensor, and now the truck still cranks for a long time, but idles smoothly, at a high rpm. If I put it into gear, it dies immediately. Also, if I blip the throttle, the rpm's come down slowly. New map sensor did not help. throws codes 33 and 34... New fuel filter as I just replaced some fuel line, maybe I'll try running it wothout one for a minute. I'm at a loss here... and should I be able to move the plunger on the IAC by hand?