Author Topic: What is this AAZ pump?  (Read 7311 times)

Reply #15November 15, 2010, 07:08:34 pm

rallydiesel

  • Veteran

  • Offline
  • ***

  • 1880
Re: What is this AAZ pump?
« Reply #15 on: November 15, 2010, 07:08:34 pm »
As far as adjusting the cold start idle, first thing you want to do is replace the lower bolt (the T25 Torx) on the idle lever with a hex bolt. You will need a M5 x 0.80 bolt that is quite short. This makes it MUCH easier to adjust the position of the lever when the pump is on the engine. After that, it's just a matter of making sure the cold-start mechanism is set at the lowest idle and advance so it doesn't interfere with the overall settings, set the general pump timing/idle/fueling, and adjust the cold-start advance and idle to your liking.
2006 Jetta TDI - gtb1749v, Malone 2, Frank's Titan 2 cam, VR6 clutch....
1991 Jetta TD - sold :(
2001 Golf TDI - Son's
1981 Rabbit - BEW tdi swap project

"ONCE YOU GO CLACK, YOU NEVER GO BACK"

Reply #16November 15, 2010, 11:17:51 pm

vako

  • Junior

  • Offline
  • **

  • 187
Re: What is this AAZ pump?
« Reply #16 on: November 15, 2010, 11:17:51 pm »
burn_your_money
rallydiesel

thank you for your answers. hope it will start even if the lever isn't adjusted properly, and then i will adjust it on a working engine.  i plan on buying optical tachometer soon

Reply #17November 16, 2010, 02:12:16 pm

wil892

  • Junior

  • Offline
  • **

  • 216
Re: What is this AAZ pump?
« Reply #17 on: November 16, 2010, 02:12:16 pm »
The injectors were genuine bosch remans about 1 and half years ago. Factory set to 155 bar as this pump was meant to run with. I still have this AAZ pump which I'm going to fit soon.
I just find it weird my engine runs fairly normally at 1.25mm advance. There is a little bit more smoke when cold than i would like, and on WOT. If the pump is set to factory its way too retarded.
1991 Golf MK2 GTD