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General Information => Troubleshooting => Topic started by: jackbombay on April 05, 2007, 07:11:37 pm

Title: High idle problem with rebuilt pump
Post by: jackbombay on April 05, 2007, 07:11:37 pm
The patient is an 82 rabbit, the pump leaked terribly from every possible location. I pulled the pump and sent it to DFIS in Portland for a rebuild (I tried to talk the customer into an NA performance rebuild from Giles but he wasn't into it (http://i40.photobucket.com/albums/e208/schmeldenhoffer/emoticons/icon_confused.gif)

  At any rate, I got the pump installed yesterday along with a bunch of new seals and gaskets, the engine was a MESS, FILTHY, but it should hold its oil now.

  I went and fired it up today and drove it around, it was sort of smokie (grayish) to start with, but that cleared up for the most part as it warmed up, it had been sitting all winter which I'm sure didn't help.

  The idle does seem a touch on the high side, but no tac so I can't say for sure, once it was all warmed up and I'd driven 3 miles or so the idle would sometimes stick at about 2000 RPM, kicking the pedal wouldn't "fix" it and the linkage was NOT binding, letting the clutch out (changing the engine RPM would "fix" it)

  I popped the hood and looked at the linkage and it was definitely returning to the idle stop.

 Is this something that will go away if I lower the idle speed?

What else can it be?

  I really don't want to pull the pump again...
Title: High idle problem with rebuilt pump
Post by: burn_your_money on April 05, 2007, 07:16:44 pm
starting on page 2 there are some suggestions on how to fix a hanging RPM. not quite the same issue but it may apply

Did the shop bench test and calibrate the pump or just reseal it?
Title: High idle problem with rebuilt pump
Post by: jackbombay on April 05, 2007, 07:19:24 pm
Quote from: "burn_your_money"
starting on page 2 there are some suggestions on how to fix a hanging RPM. not quite the same issue but it may apply


  On page 2 of what? Hanging idle is exactly whats going on.

Quote from: "burn_your_money"
Did the shop bench test and calibrate the pump or just reseal it?


  Full on rebuild so I assume it was calibrated.
Title: High idle problem with rebuilt pump
Post by: burn_your_money on April 05, 2007, 07:23:03 pm
Quote from: "jackbombay"

  On page 2 of what? Hanging idle is exactly whats going on.


 :oops: http://vwdiesel.net/phpBB/viewtopic.php?t=7373 looks like I forgot the key part of my post

Were the injectors done?
Title: High idle problem with rebuilt pump
Post by: jackbombay on April 05, 2007, 07:29:31 pm
The injectors weren't done, one piece at a time $$$$.

  When fully warmed up the car still smoked a bit at WOT and above say 2500 (?) RPM so backing off that screw you mentioned could be just the ticket.

  I am at 6,200' above sea level so I was expecting some smoke due to %18 less air.
Title: High idle problem with rebuilt pump
Post by: jackbombay on April 06, 2007, 11:57:07 am
a 1/4 turn off the max fuel screw did the trick!