fastbob67

Hey guys trying to find out what can cause my truck to get prime. I have already replaced the fuel pump the pump relay . I can pour some fuel down the tbi and runs until i shut the truck back off . I also checked to make sure the pump is running in the tank and it is . I also checked to make sure i have power at the fuel pump relay and i get 11.8v when i check .

kevinkpk

I'd be nice to know what year ect. Does it have emissions on it?

fastbob67

the truck is a 1995 and it has all the emissions on it

kevinkpk

Is the check engine light on?

fastbob67

no i think i may have found the problem .I have a neighbor who has a tbi on his truck and when you start to crank the truck the fuel starts to spray down the throttle body and mine is not doing that. If i am getting power to the injectors it should spray fuel down the intake correct.

chevyboy1993

check the ignition control module

fastbob67

Yeah i think everybody is telling me to look at the icm in the the truck

chevyboy1993

had same problem on 92 s10. replaced everything you did and when finally got it to fire i noticed the injector spray was weird so i called a friend who is gm master tech and he said the icm controls the injector pulse. it's about 25 bucks

SgtBummrush

I have a 1995 1500 v6 2wd with the same problem replaced fuel pump and sending unit.replaced relay but noticed there is no power to the fuel pump relay. If i spray or pour fuel in bowls it will run for a few seconds. I am really stumped has anyone found a solution?