[Vwdiesel] I have an idle, but it dies on acceleration

[James Hansen]

No, no, don't do that (tapping)- they are on the pump shaft, and stuck to
the carrier on the shaft, more or less isolated from the shock anyway.  The
vanes usually free  up by themselves eventually if that's the cause.  I've
had a pump that was idle for quite  awhile on the test bench that we ran at
full bench rpm for five minutes before they unstuck.  I would fill the pump
with diesel purge or a goodly snort of stanadyne fuel additive poured in
through the solenoid hole, and let it sit for a day, then try running it,
and try to keep the rpm's up as best as possible- it's a vane pump, and
centrifugal force is your friend to get the vanes back out.

-james

 

From: mfgavia at aol.com [mailto:mfgavia at aol.com] 
Sent: Monday, August 17, 2009 10:57 PM
To: jhsg at sasktel.net; vwdiesel at vwfans.com
Cc: Mfitzsim at aol.com
Subject: Re: [Vwdiesel] I have an idle, but it dies on acceleration

 

James,

It was running when it was pulled from a rusty golf that sustained enough
collision damage it was deemed not worthy of repair.

Would carefully tapping the pump with a rubber hammer help loosen things?

mark

If it is for sure exactly as it was when last running well, then the






internal charge pump may have stuck vanes, which the diesel purge should






eventually loosen up.







 

 

 

-----Original Message-----
From: James Hansen <jhsg at sasktel.net>
To: Mfgavia at aol.com; vwdiesel at vwfans.com
Cc: Mfitzsim at aol.com
Sent: Mon, Aug 17, 2009 9:26 pm
Subject: Re: [Vwdiesel] I have an idle, but it dies on acceleration

Sounds like either the charge pump has stuck vanes, it could be a fuel






restriction, or an incorrect pump throttle lever position.






Did you have the pump top levers off?  Or to rephrase that, has it ever ran






right for you and you don't know that the levers are on right?  






If for sure you have good fuel supply, and the internal charge pump is






working fine.






They may have to come off, then be reinstalled to the next mark.  You have






to take it apart, and keep the bottom one on so you can see where it indexes






to the throttle shaft, then turn things to the next mark, so the pump is






opening more.






If it is for sure exactly as it was when last running well, then the






internal charge pump may have stuck vanes, which the diesel purge should






eventually loosen up.






-james













> -----Original Message-----






> From: vwdiesel-bounces at vwfans.com [mailto:vwdiesel-bounces at vwfans.com]






> On Behalf Of Mfgavia at aol.com






> Sent: Monday, August 17, 2009 5:28 PM






> To: vwdiesel at vwfans.com






> Cc: Mfitzsim at aol.com






> Subject: [Vwdiesel] I have an idle, but it dies on acceleration






> 






> Its an 82 diesel vanagon with a recently  installed, used 1.9 AAZ TD






> that






> sat for 5 years without use.






> 






> New glow  plugs, fresh fuel, and new air and fuel filter have provided






> quick starting, a  fairly stable idle, and the unmistakable whine of a






> turbocharger.






> 






> It  takes quite a bit of accelerator movement to gain any increase in






> rpm;






> and if I  accelerate it all the way, the engine rpm does increase






> before the






> engine simply  dies. I can restart it without difficulty and repeat the






> process right away.






> 






> After the engine warms up a bit, the idle gets less even and it






> eventually






> dies without trying to accelerate it.






> 






> I ran two cans of "diesel purge" through it directly  out of the can;






> the






> idle evened out, it ran at a higher rate of speed  without quitting,






> and it






> died if I released the accelerator too  quickly.






> 






> Using the fuel return line, I have suctioned fuel from the tank






> through






> the filter and injection pump. I have opened each injector line a bit






> and






> bled fuel out. I have checked the timing and everything appears OK.






> 






> Any thoughts? I've tried everything that's worked for me with other






> engines.






> 






> thanks!






> 






> Mark






> Portland






> 82 vanagon w/ 1/9 AAZ TD






> 89 jetta  Diesel






> 






> _______________________________________________






> Vwdiesel mailing list






> Vwdiesel at vwfans.com






> http://www.audifans.com/mailman/listinfo/vwdiesel













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