95' power stroke Injector question

[mattswan267]

I have a 95 f250 I'm working on here. It has a bad injector, I am getting ready to tear into it and swap it out. My problem is that I do not know which injector it is. I shot a heat gun as close as I could to each exhaust port and everything is within 10-20 degrees or so, No definite dead hole.

What are my options as far as how to test which injector is bad/not working?

[BigFuel]

With the truck idling pull one of the 4 VC connectors and listen to the motor. If the truck idles down and struggles a little it's probably not those two injectors. Do this for each and it will at least get you to what two injectors it could be. Other than that pull the VC's and start the truck. Each injector has an oil port that dumps the HP oil after firing and look for the one not dumping oil back into the head.

[mattswan267]

Awesome thanks! I think I got it pin pointed now. I pulled the two possible injectors out and I'm going to take them in to get tested. I found out my glow plug relay was smoked so maybe that's why the injector went out?

Anyway, I'll keep updated on what happens

[madpogue]

That wouldn't make an injector fail, not directly. A GPR problem might cause some part of the UVC wiring to burn up, which might cause an injector on that same harness not to work. But it probably wouldn't damage the injector, and the damage to the wiring would be what you really have to address. How did the wires/connectors look while you were doing your testing? How about the terminals in the gaskets?

[mattswan267]

All the wiring harnesses inside. Appear to not be burnt up.