Clearing up some contradictions...

[fatmobile]

 I see this is an old post but I didn't find one with more info to bump.

 I'm playing with my first pump that has the idle bump connected to the cold start lever.
 
This is a pump I pulled off a car at the salvage yard.
 It was missing the spring on the end of the governor, I think it's called the idle spring.
 I grabbed one from another pump and put it on the one in the picture.

 So my first question is are these supposed to have an idle spring?

 ... because inside:


where the screwdriver is pointing,... there is no spring.
 You can see the hook the small idle-bump spring connects to, the one that gets pulled when the see-saw idle is adjusted.
There has always been a small spring between that lever,
 which below holds the ball which fits in the collar,

 and the lever the accelerator springs hold onto,
 which is moved with the residual fuel screw.

 I'm having trouble adjusting everything for more power and a low idle.
 I can get it to run good but can't get any black smoke or power anywhere above midrange.

 Usually I'd turn in the max fuel screw and back out the idle.
 The idle is adusted by the 7mm cap nut on the rod going down to the cold start lever.
 By the way when you turn the cap; the whole rod is supposed to spin.
 I'm not sure what threads into what, if it threads into the plastic at the base.

 Idle also limited by one of the lock-nutted screws above the see-saw
 and on the back of mine there is a torx bolt change the change the relationship between see-saw and the cold start rod by allowing it to slide in the adjuster slot.

 This pump's adjustment change more than just the max fuel and idle.
 I swear some times it misses like the timing is retarded when revving.
 A few adjustments and it'll smooth back out,.. but I still can't get black smoke or enough power.


 
 

 

[92EcoDiesel Jetta]

Looks like you're missing the middle (intermediate) spring

[fatmobile]

Yeah, that's my way of doing a governor mod.
 I should have mentioned it but didn't want to get off topic.
I removed that spring and put a few washers in it's place.
 If anything it should make more smoke and power with it so that's not why I'm low on power and smoke.

[TylerDurden]

and another spring missing on the left end....?

[theman53]

Your way does mod the governor, but it is harder to drive. It will not increase high RPM fueling either so that maybe why you cannot get black smoke or enough power.

[92EcoDiesel Jetta]

and another spring missing on the left end....?

x2, now that you mention it.

[fatmobile]

and another spring missing on the left end....?

I think that's just the peogot spring setup.
 I haven't seen an added spring on the very end on a VW.
 Unless you are saying the idle-bump pumps are definately supposed to have another spring on the end.
... the idle spring was missing.

 "Your way does mod the governor, but it is harder to drive. It will not increase high RPM fueling either so that maybe why you cannot get black smoke or enough power"
 I understand this is a mild gov-mod compared to some but it has always given me good power through the range
 with none of the idle problems I've seen attributed to this setup,..
 
and it has always given me enough smoke with the other pumps I have it on.
 Including the 109AG I just took off, I could belch a big cloud then pull the VNT turbo lever and take off.
I can't even get much black smoke off boost with this pump. A puff  then it turns whiteish.

 If this didn't have a idle-bump I'd lower the idle and turn the max fuel screw in.
 so Plan A: I'll try lowering the idle as far as I can,
 using the torx screw on the back,
 the 7mm cap-nut on top of the rod going to the cold start,
 the residual fuel screw.
 and the low idle stop for the see-saw

 Then I'll set the accel arm on the spline that works best with the max fuel screw.
 
 I think this is going to cause it to stumble on acceleration.
 


 

[92EcoDiesel Jetta]

and another spring missing on the left end....?

I think that's just the peogot spring setup.
 I haven't seen an added spring on the very end on a VW.
 Unless you are saying the idle-bump pumps are definately supposed to have another spring on the end.
... the idle spring was missing.
..  .......
 

 are we talking about the governor spring or the other spring? the pic I posted the left 1 is a VW  the right 1 is a Peugeot governor and they both have a spring on the left.

[fatmobile]

In the pic the peogot pump has a spring to the left of the idle spring,
 I don't know what to call it because it's not listed as being on any of the VW pumps.

 Your picture contradicts what you are saying, the VW spring setup has no spring to the left of the idle spring.

 Well, I'll see if  can figure out how to adjust this pump.
 If I do I'll post it.

[8v-of-fury]

In the pic the peogot pump has a spring to the left of the idle spring,
 I don't know what to call it because it's not listed as being on any of the VW pumps.

Thy are both an idle spring.

I can't even get much black smoke off boost with this pump. A puff  then it turns whiteish.

If the smoke is turning white as RPM's pick up I would suspect your timing is way to far advanced, or your pumps pressure is way too high causing too much advance.

[theman53]

I would take the intermediate shim out and put the spring back in and see if that helps. Shimming that area doesn't fare well, and will not give you any more high rpm fuel.

[libbydiesel]

Fatmobile, your idle spring is the one that is the extension spring that's hooked to the seesaw lever and hooks to the control lever assembly.  Removing and shimming the intermediate spring will raise the high rpm fueling the same amount as leaving the intermediate spring in place and shimming the main spring.  The difference between the two actions is that removing and shimming the intermediate spring area more significantly changes the feel of the first part of the pedal.  It makes the first part of the pedal more sensitive and the upper part of the pedal less effective.  There's nothing wrong with either way provided you like the way the pedal feels.    

[theman53]

When I did the intermediate spring it wouldn't "blow black smoke" This was before I had EGT gauge and it isn't a real good measure I know. I would think that the main fuel spring would still compress the same ammount and not fuel fully. I thought since the IM spring was on the other side of that assembly and not in contact with the main spring at all it would have 0 input on what the main spring did? Basically, shimming the IM spring would just take up the spring space and make it not cut the above idle RPM fuel going right to running strictly off the main spring? How would you discribe it, I am all for learning.

[92EcoDiesel Jetta]

In the pic the peogot pump has a spring to the left of the idle spring,
 I don't know what to call it because it's not listed as being on any of the VW pumps.

 Your picture contradicts what you are saying, the VW spring setup has no spring to the left of the idle spring.

 Well, I'll see if  can figure out how to adjust this pump.
 If I do I'll post it.

OK I see what you're saying now. The spring on the left (to the left of the idle spring) is visible only in the Peugeot governor on the right in the pic above, not in the VW governor.

I remember the Peugeot governor is longer than the VW governor when I measured them last year. Dug up this old pic which shows the different lengths. That 4th spring is barely visible in the Peugeot governor (most of it seated in and hidden by a cup). That's the lightest of the 4 springs. My guess is it gives a very sensitive off idle throttle?


I found an old pic which shows

[fatmobile]

Fatmobile, your idle spring is the one that is the extension spring that's hooked to the seesaw lever and hooks to the control lever assembly.  Removing and shimming the intermediate spring will raise the high rpm fueling the same amount as leaving the intermediate spring in place and shimming the main spring.  The difference between the two actions is that removing and shimming the intermediate spring area more significantly changes the feel of the first part of the pedal.  It makes the first part of the pedal more sensitive and the upper part of the pedal less effective.  There's nothing wrong with either way provided you like the way the pedal feels.    

 What does that idle screw thread into?
 I see the whole rod turning down to the lower spring.
 Does it thread into the plastic piece at the bottom? Or is there a stud coming from the plastic that it threads onto?
 How many threads/turns does it have before something comes apart and a spring flies?
 And there is an adjustable stop the see-saw rests against that can be screwed out. My plan is to have that backed all the way out.

 I don't throw my intermediate springs away. I'll try the solid main with an IM spring some time but I like the feel of this gov mod for daily driving.

If the smoke is turning white as RPM's pick up I would suspect your timing is way to far advanced, or your pumps pressure is way too high causing too much advance.

Thanks 8v, I can check both of those. Right now it's timed by ear and effect the cold start has on it. It stumbles on startup until I pull the cold start.
 Internal pump pressure is something I haven't checked yet and it makes sense to see how the timing curve is working on this.
 I'll have to bust out the diesel pulse timing light/tach and internal pressure gauge.

 I keep thinking it has something to do with the residual fuel screw and how it relates to the idle adjustment.
 Someone said the residual fuel screw shouldn't effect idle much but it does.
 I suppose it could be set up so at idle the idle spring pulls it's lever away from the one the governor spring connects to.
 and the governor spring pulls them solidly together (no spring) when accelerating.
 If this is the plan then lowering the idle will let that lever rest against the one the governor spring connects to,.. at idle. They basically become the same lever.
 Soo I'm still in theory about this pump's adjustments but it's really cold out these last couple days, not so bad until coupled with high winds.