GMC 99 will not start
#1
GMC 99 will not start
I need some help. We have a 99, 3500, 5.7 with duel tanks.
It will not start. We have tried a new computer,Installed a new fuel pump,filter, wires,and plugs. The parts replaced needed it. But now the pump will not pump. we have lots of spark.When a shot of gas ispoured in the engin starts and runs till the gas is used. What now?
It will not start. We have tried a new computer,Installed a new fuel pump,filter, wires,and plugs. The parts replaced needed it. But now the pump will not pump. we have lots of spark.When a shot of gas ispoured in the engin starts and runs till the gas is used. What now?
#9
RE: GMC 99 will not start
Here is my thinking...it died on the road...fuel pump was bad...
however,you put a pcm in,and did not program it....so even though you put the pump in later,the pcm has it down.
do you have the original pcm to try?
however,you put a pcm in,and did not program it....so even though you put the pump in later,the pcm has it down.
do you have the original pcm to try?
#10
RE: GMC 99 will not start
Yes I have the origional. The parst replaced in order were the fuel pump first(no start) the fuel filter(no start)the PCM )no Start. After each piece replaced the engine would run if gas put in by hand. The engine still will not run without gas put in by hand. The test light indicates power at the pump.