Quote:
Originally Posted by barry12345
A 200K injection pump only run on diesel fuel. Is a steal of a deal in my books at 100.00. Most sourced used pumps for these turn out to be good.
As for having to add pedal to get it started. If the delivery valves are really crudded up. It may reduce available injector pressure. Requiring more fuel needed to increase it. Just something I have suspected for some time.Perhaps about the same effect as bad element sealing..
I once toyed mentally with a way to verify the state of the delivery valves. By making certain the element was in the feed position. Then doing a pressure leakdown test back through the hard line. With the injection pump on the car. Using a pop tester and fittings. Over time there had been too many unresolved hot idle issues.
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The delivery valves were definitely nasty... but all cleaned up and were not sticking (after being cleaned).. nor do they have any play between the components. Just smooth movement. No real change to how it starts.
I'm pretty certain at this point that I'm going to bite the bullet and swap the pumps just to eliminate it from the equation. Knowing what the components looked like when I opened it up.. knowing the crap I pulled from the fuel tank (about 10lbs of solidified veggie and fat).. I'm sure the pump is a problem.. maybe not all of it.. but at minimum, some of it.