That pump with the moving pulley

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Hello,

I have just installed a pump that I do not know is good... except I should say I saw the spray pattern from it with my injectors and seemed well atomized and not drippy, the internal pressure was good I think (39psi at 1000 and 60 at around 2000).....

The car (vanagon) starts but after many cranks (10) and stinks and smokes of unburnt diesel.

It has a new engine... the injectors are two or three years old.

Here is the question:

I wonder.... will the engine run at all if the pump is 90deg off time? I have the AAZ pump with the moving pulley and the timing is so easy to set but when removing the pump from the donor car (thanks caveman) I removed the hub of the pulley also. There is no way of knowing what position to place the hub as there is no key way in the pulley. I put the pulley in place where it seemed have a corrosion mark where the key was not. It would seem I did the right thing but my other pump (AAZ) would be timed with the key way 90deg off from the way this pump was timed.

Anybody want to take this on?

I will try timing it at .039" with the key in the position of the other pump.

I hope this is not too confusing... sorry.

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Thanks again to you Andrew.... I just did that and the pump is 90deg off... maybe the injector lines are different with these pumps. I will re-time it with the real pump position in the morning.

I can't believe it ran at all!

Stv

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I was wrong. It is in time, the proper fuel line gets the fuel to #1 at TDC.

I guess the pump is no good.

[theman53]

Could you also take the nut off the IP sprocket and see which way the woodruff key slot is? If I remember it sould be pointing at about a 10:00 position...I had mine 180 off once this is how I know.

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I will check the lobes again but when I timed it the flywheel mark was at it's place in the hole on the bell housing, the steel plate I use (it is the full thickness of the cam slot) was in place ( I don't think it would fit 180deg out). I am pretty sure the lobes on #1 were both up. The pump (just confirmed) was injecting to #1 and set to .039 with dial indicator (cold start position toward the pulley.)

I have another pump so if I confirm timing as good again I will swap the pump with one I know is good (without the nice pulley and with a cracked bolt hole) and try it. Maybe the injectors are bad... I will know soon. I left them on the head when it went for testing. The head tested good but it came back clean and with the injectors in place so maybe they cleaned the head with the injectors and filled them with gunk. They did seem to have a decent spray pattern though.... hmmm.

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I just tried my old pump and it did exactly the same thing. Rough start, smoke like a really cold morning and no advance, and it stalled when given fuel.

I think the injectors are finished... filled with crud from the cleaning of the head.

I will have a set of injectors later today to test with (thanks again caveman.)

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Ok I installed the injectors... used but different than mine.... the good news is that the engine did the same thing, smoke, random rough running, rougher when fueled...... the bad news is that it did the same thing and I don't really know why and I am still worried.

I checked fuel restrictions: good for the return line... blew the fuel out easily and could feel bubbles in the tank.

The fuel supply however showed much improvement when the pump was pulling directly from a bottle of ATF.... things after 30sec-minute became smooth, less smoke and even when gunned.

I by-passed the filter in another test and it seems like a restriction in the tank... I don't how this would have happened in the short while it was on stilts I guess a piece of rust fell and blocked the intake in the tank.

So in summery... it is not likely timing, a bad pump, bad injectors or low compression...... I should say when I measured the deck/ piston height it was smaller than the thinnest gasket specs. Mine measured at 0.62mm and the thinnest gasket size starts at 0.66mm and is good up to 0.86mm. But people put three notches on these all the time and it doesn't smoke like steam engine and besides it worked well on separate fuel supply albeit ATF.

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I think this thread no longer applies to my situation. Thanks for your help with the pump.

The engine starts fine the timing is good.... different pumps tried, different injectors, the engine has been run from a jerry can, the solenoid plunger has been pulled. The problem is that it will start be when turned of warm it will not restart. 

I will start another thread called: "No warm start."