bad injection pump?

jarad · Posted: Sun Jul 11, 2010 7:59 am Post subject: bad injection pump?

so, i bought a resealed pump off a guy on vwdiesel. i went to go install it on my TD vanagon. i had a running pump on it before, but it was an n/a pump. excited to put a turbo pump on, i put it on, set it all up, and used a mighty vac to pull fuel through the return line. i then pulled fuel thought he return lines on the injectors. after a bunch of cranking, i still am not getting fuel out of the cracked injectors. nothing. not a dribble, spit, or anything at all. i verified the solenoid was working and even swapped it for the one on my old pump which was running just a couple of hours previous. am i off base to think this pump is no good? i can't come to any other diagnosis! i've primed other pumps and always gotten fuel to the injectors. any other thoughts?
thanks!
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1987 Sunroof Syncro
1987 Syncro Adventurewagen

Zeitgeist 13 · Posted: Sun Jul 11, 2010 8:54 am Post subject:

Did you manually prime the pump itself, as in fill it up from the top? When I was in the biz, whenever we broke into the fuel system on a VW diesel, we always topped up the pumps with a little ATF.
_________________
Casey--

'89 Bluestar ALH w/12mm Waldo pump, PP764 and GT2052
'01 Weekender --> full camper
y u rune klassik?

jarad · Posted: Sun Jul 11, 2010 8:57 am Post subject:

I used a mighty vac to pull fuel from the filter through the pump. That way has always worked for me before.
_________________
1987 Sunroof Syncro
1987 Syncro Adventurewagen

Zeitgeist 13 · Posted: Sun Jul 11, 2010 9:24 am Post subject:

I read that, but having no experience with that method, I'm not sure it completely evacuates the air from the pump. By manually filling the pump, you can be sure you're directly displacing the air. It certainly can't hurt.

Have you contacted the seller and asked for their advice?
_________________
Casey--

'89 Bluestar ALH w/12mm Waldo pump, PP764 and GT2052
'01 Weekender --> full camper
y u rune klassik?

jarad · Posted: Sun Jul 11, 2010 3:50 pm Post subject:

well, i just re-installed my original pump and it primed and started 30 seconds from being dry, so, i am pretty certain that pump was faulty......i have contacted the seller and we'll see what he says. Rolling Eyes

_________________
1987 Sunroof Syncro
1987 Syncro Adventurewagen

crazyvwvanman · Posted: Sun Jul 11, 2010 4:50 pm Post subject:

I have seen this stuff perform miracles on VW diesel pumps that sat around for a while and then wouldn't work because the old dried mung inside was plugging it up. I'm not kidding. Prime the pump with it and let it set a while, then crank the engine.

http://www.worldimpex.com/parts/lubromoly-diesel-purge-169oz-lm2005_60869.html

The vacuum on the return works great to pull fuel into the pump.

Mark

jarad · Posted: Sun Jul 11, 2010 6:46 pm Post subject:

i would have considered the diesel purge, but the pump was just resealed buy this guy's buddy. odds are he make a mistake on assembly. sucks, but at least i have my original pump and can still cruise while i figure it all out with the seller.
_________________
1987 Sunroof Syncro
1987 Syncro Adventurewagen

crazyvwvanman · Posted: Sun Jul 11, 2010 6:49 pm Post subject:

Ok, but resealing the pump does not have to mean it was taken completely apart and cleaned.

Mark

westyventures · Posted: Sun Jul 11, 2010 8:33 pm Post subject:

BTW, diesel purge is now available at you friendly neighborhood NAPA auto parts. They acquired Altrom and access to a good supply of VW and Audi parts.

?Waldo? · Posted: Sun Jul 11, 2010 8:52 pm Post subject:

Is the fuel being pulled by the pump and ejected out the return line (it should any time the pump is cranked)? If not, then it would indicated that the vane pump is not working properly. If it is flowing through the inlet and outlet when cranked, but not getting to the high pressure lines, then the most likely cause would be an error in assembling the control collar or lever assembly that indexes into it. Either way it most likely means that the pump needs to be pulled apart to be fixed.

jarad · Posted: Mon Jul 12, 2010 5:14 am Post subject:

?Waldo? · Posted: Mon Jul 12, 2010 8:18 am Post subject:

You might try pulling the metal lines off and then cranking just to see if any of the delivery valves spit at all. You can also remove the plunger and spring from the stop solenoid in order to completely eliminate it as a possibility.

jarad · Posted: Mon Jul 12, 2010 5:46 pm Post subject:

i tried both of those, and still got absolutely nothing out of the the pump on the high side....not a drip
_________________
1987 Sunroof Syncro
1987 Syncro Adventurewagen

skifree · Posted: Tue Jul 13, 2010 8:44 am Post subject:

If you want to wake up your Vanagon, send your pump to Giles Gallie at www.performancediesel.ca he will custom tailer it to your application. The dynamic timing mod he does really makes for great drivability.My vanagon feel as powerful as my tdi wagons. Quarter thottle @ 60 mph,with 800 egt on the flats.


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