Author Topic: throttle shaft seal change, no start (Read 5612 times)

slorimer · « **Reply #15 on:** February 03, 2008, 02:02:03 pm »

Alright thanks a bunch

I can't see the spring but I'll have to try and fish something down there. Otherwise I guess I'll have to remove the pump to turn it upside down, to get it out. Crap.

slorimer · « **Reply #16 on:** February 11, 2008, 07:57:51 pm »

Okay so I ended up having to remove the pump to get the spring out. That was fun got to change the timing belt and thermostat which I had been wanting to do. So I put the new timing belt on and stopped there. Before putting the other belts and injection pump lines back on I decided to check to see if the pump was shooting any fuel at all. So I primed it by pushing fuel in through the inlet until I saw a steady stream out the return. Then I connected the fuel cut solenoid after removing it and checking its operation. So now when I crank I see fuel coming into and out of the pump and I don't seem to see any leaks anywhere. I think this suggests the fuel stop solenoid is functioning otherwise I wouldn't see the fuel flow. However cranking it for 3 or 4 20s periods and I haven't got a drop out of the those little valves on the injection pump before the injection lines. I paid particular attention to the throttle shaft seeing how it moves the control collar and ensuring it can move it to max throttle setting. So now I have absolutely no idea why it isn't pumping. Any ideas?

Vincent Waldon · « **Reply #17 on:** February 11, 2008, 08:35:24 pm »

You're getting closer to victory for sure.

The fuel solenoid controls the flow of fuel to the high pressure side of the pump, so even with a bum solenoid you will continue to see fuel flow thru the pump. Good engineering actually.. the pump continues to cool and lubricate itself even as it idles down when you shut off the solenoid.

A lack of fuel at the output ports (assuming you've cranked enough to prime that end of the pump... which you seem to have done) with good circulation means there's an issue on the high pressure side... some common causes are:

- no voltage to the solenoid... does it click when the key is turned on and off ?
- a bad solenoid... to test you can pull it, remove the plunger and spring, and put the solenoid body back. Be ready to stall the engine with the clutch and tranny/brakes if it starts !
- the control collar disconnected from the throttle level during reassembly
- a blockage (ie dirt, sludge, etc) internal to the high-pressure side
- fuel screw turned out too far (did you move it during assembly ?)

Just some things to try...

Vince

slorimer · « **Reply #18 on:** February 13, 2008, 07:59:45 am »

So I removed the guts of the solenoid and tried cranking again, still no fuel at all coming out the ports.

So I guess I'm left with,
-control collar disconnected(doubt it cause I could see the collar moving on the plunger when moving the lever.
-blockage internal to the high-pressure side is a possiblity although I never saw anything convincing and the pump was quite clean to begin with.

Haven't touched the fuel screw.

I'm thinking of grabbing an injection pump from a wrecker, although that comes with its own unknown problems. Any other suggestions?