I have a problem that seems to be a common problem here. 92 tbi 4.3 "z" will not start unless i pour carb cleaner into the intake. I have already replaced the FPR, and the whole rochester model 200. replaced the FP relay. And the fuel filter. i dont have the fitting i need to test the fuel pressure. But i dont really suspect the pump. (even tho i have read on here that it takes a little bit more fuel pressure to get it started then to keep it running.) what the exact problem is, is the injectors dont spray unless it has already started. it runs great aslong as i dont turn it off. are there any sensors that would keep the injectors from spraying? One thing that i can think that could have jacked it up is here in nebraska they have been adding alot of ethenol to the gas and it has been filled up with 10% ethenol gas. any ideas? Thx in advance.

 

I have the same problem with my 88 s10 with 2.8tbi. it may be your Ignition control module which is located on ur distributor. and it could also be the other sensors on your throttle body, IAC ,or Tps...