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View Full Version : Figuring out if injector pump is bad



LaRell
07-13-2006, 20:35
Okay, so what is the best way to know if the injector pump is bad? I think I allready know it is but not positive.

Have fuel to injector pump. Pink wire is hot with 12 volts, and when I unplug it I can hear the IP click when the key is on. Loosened fuel lines at injectors, and cranked engine multiple times, and only got just a tiny bit of fuel to come out even when I took a couple of the lines completely off the injector to make sure I was getting flow.

What do you think? Obviously bad? Do these IPs normally die slowly. As in, together with bad glow plugs, would the IP over time make the vehicle harder and harder to start til eventually it just doesn't start at all? Because that's what happened with this engine. Slowly quit starting as easy. I am almost positive almost all of the glow plugs are shot. Haven't had time to check them all yet. Work a LOT. Going to replace them, but if I'm not getting fuel to the cylinders that won't help much:-)

Thanks:D

john8662
07-14-2006, 06:27
Was the engine run dry on fuel?

Usually the symptom of getting harder and harder to start is due to plugged fuel filter and or air entering the system, leading to losing it's prime while sitting.

Verify that you have fuel to the IP, to really do this requires a fuel pressure gauge.

When getting air out of the IP, did you have the injector lines loose prior to the cranking?

It's sure possible that the IP has failed, it does happen.

J