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

Engine Specific Info and Questions => IDI Engine => Topic started by: dillenger1 on January 05, 2009, 03:16:48 pm

Title: LDA function test, 10mm head
Post by: dillenger1 on January 05, 2009, 03:16:48 pm

Im trying to get the lda to limit a little more fuel when off boost.It seems sometimes like it isnt functioning.I have a t3 on it now,and ill see smoke till im making 10-15 psi.Theres a very fine line(between smoke and power) with my 10mm.I know the full load will override the lda if turned up to much.Maybe raise the smoke screw?Im trying to burn the extra fuel or limit it till i get up to pressure.SO my question is with the lda cover off:if you press down on the diaphram when idling shouldnt it raise the rpm?Or does it need the flyweights to be pushing to engage the collar plate?

Title: Re: LDA function test, 10mm head
Post by: jtanguay on January 05, 2009, 03:26:41 pm

Quote from: "dillenger1"

Im trying to get the lda to limit a little more fuel when off boost.It seems sometimes like it isnt functioning.I have a t3 on it now,and ill see smoke till im making 10-15 psi.Theres a very fine line(between smoke and power) with my 10mm.I know the full load will override the lda if turned up to much.Maybe raise the smoke screw?Im trying to burn the extra fuel or limit it till i get up to pressure.SO my question is with the lda cover off:if you press down on the diaphram when idling shouldnt it raise the rpm?Or does it need the flyweights to be pushing to engage the collar plate?

yes if you push down it should simulate boost, and therefore enrichment.

Title: LDA function test, 10mm head
Post by: vanbcguy on January 06, 2009, 12:27:48 am

Not sure about that... On my pump anyways there isn't any tension on the feeler unless the accelerator lever is moved... Try looking down the bore with the boost pin removed, the feeler is retracted in  to the pump body.  Press the accelerator lever and it 'pops' out to press against where the boost pin would be if it were installed.

Note you'll have to push it back with a small screwdriver to get the boost pin in again after you do this...

Title: LDA function test, 10mm head
Post by: jtanguay on January 06, 2009, 12:45:19 am

(http://img116.imageshack.us/img116/7185/loadingpressureenrichment3zm3.jpg)

Title: LDA function test, 10mm head
Post by: dillenger1 on January 06, 2009, 03:21:20 am

the flyweights are pressing on that same  plate, correct?Ive pushed down on it while running and theres no change.Can anyone verify this as correct function or lack there of?

Title: LDA function test, 10mm head
Post by: theman53 on January 06, 2009, 05:18:41 am

Quote from: "jtanguay"

(http://img116.imageshack.us/img116/7185/loadingpressureenrichment3zm3.jpg)

That is one of the best diagrams I have ever seen. That foot that is on the go pedal is one of the most accurate feet on this forum that isn't real.  :lol:
Just kidding that is amazing that you have so many helpful tools for us all.

Title: LDA function test, 10mm head
Post by: dillenger1 on January 06, 2009, 05:13:51 pm

bump,so can someone verify this?(pushing down on the diaphram will cause an icrease in idle).

Title: LDA function test, 10mm head
Post by: blkboostedtruck on January 06, 2009, 05:52:31 pm

i'm pretty sure it won't do anything till you have a load on it!
like driving and spooling the turbo! you know what i mean?
but the person to ask Ben would be Martin (Tintin)
Duane

Title: LDA function test, 10mm head
Post by: dillenger1 on January 07, 2009, 03:29:29 am

Ive got the pin maxed right now,and the star wheel is in its stock position.I can see where the guide is riding on the pin,but i may still have to turn the max fuel down.