I have an 87 pickup 4x4 with EFI
Have everything back together after rebuilding motor
I have spark at all four plugs
Rebuilt injectors
Fuel in the fuel rail
Cold start injector works because the truck will first and run a couple seconds from the fuel from that injector
With the key on the blue and yellow wires are hot
The 2 whites and white and reds for the other side of the injectors are hot
I have check the splices within the harness and they are good.
Have grounded everything times two
Have checked both related relays and they seem to be okay but have heard that could be misleading
I am new to these so any advise for further detection as to why the investors are not firing would be helpful

 

Good ECU ground on the intake .

Open Solenoid resistor or not hooked up ??

Bad crimps on the injector harness?? Just How are you checking these??

Break out the noid lights to see if they are getting the signal to open or if it is a mechanical problem in the injectors

 

The resistor on the inside passenger wheel well is hooked up
I have a ground from the center of the fire wall to the intake mananifold is the the ECU ground you referred to
I have not check the actual connector to the injectors because to get them off I have to take apart the EFI
C
I checked the crimps by checking the wires on either side and they are hot with the key on dead with key off
Not much of an electrician may be the problem

 

No the ecu ground is from the factory attached to the intake manifold

3 brown wires attached together

Did you measure the resistance of the solenoid resistor

Time to invest in a multimeter

 

Have multi meter just not good at it
And yes the three brown wires hook up, thanks for that was not sure what that was for, here is something that may lead to something. When attaching that ground, the one with three brown wires there is a lght spark when you touch the connection to the bolt on the intake.
That tell you anything