I have a irritating problem with my 1990 Suburban. The truck will run fine and then just die out and I mean dead. I try restarting and it will crank but will not start. Sometimes it will start after about a half hour or so. Here lately it wont start even after that. I have replaced the fuel pump, fuel filter, fuel pump relay and have rebuilt the TBI as well as blow out the fuel lines. After each one of these things being replaced the same problem still exsist. I had somebody turn the ignition while I look to see if the injectors are spitting gas and nothing. I sprayed carb cleaner in the Throttle Body and it started up and after a few sputters it ran just fine. It runs for a few minutes and then dies and has the same problem. If I spray the carb cleaner then it works again. I dont think its the injectors themselves because its hard to believe that they would both go out at the same time every time. I took it to a shop and they checked the computer and it check out ok and there were no codes. They did 350.00 worth of trouble shooting and came up with nothing. I myself check all the wires and couldn't see anything out of the ordinary. I have no idea what else it can be. Anybody have some advice.