VWDiesel.net The IDI, TDI, and mTDI source.

Engine Specific Info and Questions => IDI Engine => Topic started by: slorimer on May 23, 2008, 09:22:24 am

Title: disconnecting LDA hose
Post by: slorimer on May 23, 2008, 09:22:24 am

All

The injection pump on my 94 TD has diesel leaking from the breather port.  I was told this is due to an o-ring within the LDA leaking.  I have screwed in a spare fuel input barb so I can catch the fuel in a container.  However, since this started I have started to get heavy black smoke when I accelerate heavily, which is due to excessive fuel injected, I believe.  I was wondering, what would happen if I disconnected the hose from the turbo to the LDA.  So the pump wouldn't react to the boost pressure.  Would I risk engine damage, elevated temperatures?  Or just poor acceleration.  Anyone know, or done this before?  TIA

Title: disconnecting LDA hose
Post by: Op-Ivy on May 23, 2008, 10:32:19 am

Disconnecting the LDA hose will prevent the extra fuel being injected when the under boost. You will probably feel a lack of power, otherwise I can't think of any other negative effects.

Title: disconnecting LDA hose
Post by: slorimer on May 23, 2008, 12:49:48 pm

thanks Op-Ivy.

Or instead of disconnecting the line, should I adjust my max fuel screw so it doesn't through clouds of smoke out the back?

Title: disconnecting LDA hose
Post by: Choppercat on May 23, 2008, 04:23:07 pm

Or simply turn the diaphragm/boost pin 180 degrees will do the same without having to disconnect anything. This way you don't have to worry about crap getting into places it doesn't belong. The rounded side of the boost-pin doesn't have any fuel enrichment capability.

Title: disconnecting LDA hose
Post by: jtanguay on May 23, 2008, 05:10:19 pm

Quote from: "libbybapa"

Or, maybe fix the o-ring so you don't ruin the LDA diaphragm.

Andrew

1x

but if you must, make sure to block the pressure hose going to the LDA  :lol: