Injection Pump out?

[dlayman21]

Hello, I just bought an 84' m1008. Guy I bought it from said injection pump was bad (not sure if he meant going bad or was already bad). Truck would not start without a hint of starting fluid.....I know, I know. Once started it would do great, start back up with no problems. If it sat for several hours then it was back to starting fluid. I had been running around town for a few hours and it stalled at a stop sign, started back up but as soon as I hit the gas it would die. Changed filter and with some starting fluid it fired up and sat running for about 30 minutes and ran down the road about a mile then stalled out again. Lift pump has recently been replaced and is still pumping fluid when I cranked motor. I bleed fuel lines. Now it will start at about half pedal with white exhaust and when I release pedal it will die....Any ideas on what might be going on. Thanks in advance.

 

[m16ty]

The cold start issue sounds like a glow plug problem but the stalling at a stop sign could be a IP problem. Could be a little of both but I'd start with the glow plugs because that's the number one issue with cold start problems.

 

[dlayman21]

Ok. I am sure this is a dumb question but is there a certain glow plug that I would need to get if I buy some or just any glow plug for a 6.2?

 

[Smokinyoda]

Ok. I am sure this is a dumb question but is there a certain glow plug that I would need to get if I buy some or just any glow plug for a 6.2?

AC 60G are about the best you can get.

 

[dlayman21]

Ok thanks

 

[dlayman21]

When I hear the clunk while waiting for the " wait to start" light, it means my gp relay is good. So just need to test glow plugs?

 

[doghead]

No, you cannot diagnose the relay by sound.

Read the cucv stickys.

Download the TMs.

Use the troubleshooting procedure in the -20TM.


You may simply have a fuel/air leak, causing it to loose prime.

 

[dlayman21]

OK, thanks doghead, I will do that.

 

[wrenchturner6238]

For the stalling out part. The injection pump could have an rubber connector on the Governor ring that has came apart into little pieces and has plugged up the return orifice and that allows the pump to build to much internal PSI and the engine will stall.

 

[Chief_919]

Does it stall when it is idling, right when you let off the accelerator or right when you go to accelerate?

 

[dlayman21]

Right now it will only start at about half throttle and if I let it off 1/2 throttle then is dies instantly.