1990 Ranger Fuel Situation.

[klicky96]

Well, I'm having a situation with my derby truck. 2.9L EFI engine, no mods except hot wired fuel pump. I'm getting great spark to all cylinders. I got great fuel pressure on the rail itself, but Im getting no fuel to the cylinders. Im not understanding how every injector can stop functioning. They aren't unplugged or anything and im getting power to them. The PCM grounds the injector to operate it. Does anyone think my PCM could be bad?

 

[Rustydog2010]

Normally, most injectors are supplied a constant 12v on one pin. The the 'pulse' is determined by how long the ECU earths it for (The other pin obviously).

So first check for constant 12v with ignition on.
Then place a test light in there, then crank it, you should see the light flash.
Or you can buy special little lights that will plug in.

This will indicate if you have a injector pulse, this works for most cars. Without knowing much about a 1990 ranger, its pretty hard. Its a start anyway.

Good luck!