1996 grand caravan 3.3 v6 starts up in about 3 seconds it shuts off.
i had new fuel pump put in. good fuel pressure. coils are firing after it shuts off. the only
thing is the injectors quits firing until you shut the switch off and crank it up
again. once again the injectors quits in 3 seconds and dies out
all the cluster panel works no bad solder joints. all are good behind the cluster panel
no security lights are on. no codes but 12 and 55. i can keep it running as long
as i spray carb and choke cleaner in the intake.
i have checked and switched fuel pump and shut down relays still no go.
grandpa needs van. 9 grandkids under nine years of age waiting on camping trip thanks

 

Welcome to DF
The ASD relay or the PCM could be the problem. What you need is a DRB3 or scanner to monitor the system to see what is failing. Could also be dropping a sensor too.

 

could be the theft system also.

 

just bought this van and everything was working fine. They only thing the van needed was a radio. I went to install a radio and one of the wires touch ground! I checked the fuses and sure enough one was blown I changed it, thought everything was fine. I went to start the van. I turn the key everything lights up normal then it starts to beep. I turn the key it starts normal and three second into it it shuts down.
I have checked the 21 pin connect behind the heater control and its fine. I hit the dash and it doesn't do anything. I checked all the fuses and relays in the fuse box under the hood. I towed it to Chrysler and they could not help because the receptacle where you plug in the computer is not working and they can not get a code.

 

Welcome to DF
That means the DLC connector deosn't either have power or ground. And they or you will need to find out why.

 

or you connected the bus wires from the radio to something.