Got greedy, now to much smoke

[cervelorod]

My IDI was running really good after getting my IP timing dialed in.  I decided today I was going to shim the governor to eek out that last bit of performance for the ole NA.  After putting in the shims, and test driving, there was way to much smoke for me.  I decided to remove the shims, and now I can't get it back where it was    I am still having smoke in mid - high rpm range.  I did not have any smoke before I started this morning...

I lost my setting for the max fuel screw, so I just worked it in until I could still adjust the idle with the idle screw.  Is there any baseline settings for the max fuel screw, or maybe a procedure?

I guess if there's to much smoke, I'm going to have to bolt that turbo on....

Thanks,
Rod

[DJPyro]

If you looked at most of the gov mod DIY/Walkthroughs, it does say that after doing the mod, you'll likely have to turn your fuel screw back out, because you've overcompensated for the governor doing it's business, and you have it way over fueled. Put the shims back in and back your max fuel screw off until you're happy with your smoke levels/EGTs.

[nathan_b]

I bet your throttle lever is on the wrong spline? if not, try turning the fuel down firsrt.

[maxfax]

I bet your throttle lever is on the wrong spline? if not, try turning the fuel down firsrt.

X2

[regcheeseman]

does say that after doing the mod, you'll likely have to turn your fuel screw back out, because you've overcompensated for the governor doing it's business,

I've done 'a few' pumps, I have never EVER had to back the fuel down, I aways dial in 1/4 turn more fuel as part of the basic build - often the need more, never less.

The gov mod should not effect smoke level, because you make no changes to the effective length of the throttle linkage.

I have had problems with splines fitted wrong but that has been a reluctance to rev.

I'd agree with Nathan - check the splines

[DJPyro]

^ I won't claim to have done 'a few' pumps, but I have seen several sources which've indicated that if you were playing with your fueling on the max fuel screw, and then decided to do the gov-mod, most people tend to have gone too far with their fuel screw, and need to back it out a bit because you've now got full fuel through your whole RPM range. Also, the OP indicated that he lost any settings he had for his fuel screw, and simply played with it until he thought he got it. He also indicated that he still had a ton of smoke after pulling the shims back out.

You said it yourself, the symptoms don't fit for the splines being wrong, would it not be easier/simpler to dabble with the fuel screw a bit first, before pulling the throttle assembly back apart to move it over a spline? I'm interested as to what the issue is/was, for my own learning, but I'll hold to my theory until I find out otherwise.

I'm still learning these old VW diesels, but I do work on vehicles for a living so I'm not just stabbing completely blindly here.

[cervelorod]

Put shims back in yesterday and turned the max fuel screw way down.  A bit of smoke at full throttle, but not freight train-ish anymore.

Need to fine tune, but I am about where I want to be, idle is still a bit to high

When I messed with the linkage on the splines, it seems like 1 tooth on the splines is a huge jump.  I took a picture before I disassembled the first time, but the angle of the pic is such that it is useless.  I am 99% I am on the same spline as before.

Thanks to everyone

Rod

[regcheeseman]

I have seen several sources which've indicated that if you were playing with your fueling on the max fuel screw, and then decided to do the gov-mod, most people tend to have gone too far with their fuel screw,

Aha - theres the issue.

I have NEVER worked on a pump with the fuel tweaked prior to gov mod, my experience is solely with standard pumps.

The original poster made no mention of having previously messed with the fuel screw - that little bit of info would have changed the response to suit.



i.e. "back the fuel screw back down"

[DJPyro]

My IDI was running really good after getting my IP timing dialed in. 
...
I lost my setting for the max fuel screw, so I just worked it in until I could still adjust the idle with the idle screw.  Is there any baseline settings for the max fuel screw, or maybe a procedure?

Actually, he mentioned it twice in his original post.

Either way, OP, I'm glad you got it sorted...

[regcheeseman]

Actually, he mentioned it twice in his original post.

Mentioned yes, but it read to me that he adjusted it with the gov mod not prior to

It is not common for people in the UK to mess with the fuel setting on the pump - not unless there is other turbo related shenanigans occuring, it seems to be the thing most people are reluctant to have adjusted.
We don't like the smoke, neither does the MOT tester.

It's just not commonplace for someone to just dial in more fuel, but then few people bother with the NA engine.

[DJPyro]

And in the end, we all learned something.

[nathan_b]

And in the end, we all learned something.

have a turbo?

[DJPyro]

Yep, 1.9AAZ, K14

[cervelorod]

And in the end, we all learned something.

have a turbo?

Shortly Diesel Buddies, Shortly....

[Mossdahaus]

My IDI was running really good after getting my IP timing dialed in.  I decided today I was going to shim the governor to eek out that last bit of performance for the ole NA.  After putting in the shims, and test driving, there was way to much smoke for me.  I decided to remove the shims, and now I can't get it back where it was    I am still having smoke in mid - high rpm range.  I did not have any smoke before I started this morning...

I lost my setting for the max fuel screw, so I just worked it in until I could still adjust the idle with the idle screw.  Is there any baseline settings for the max fuel screw, or maybe a procedure?

I guess if there's to much smoke, I'm going to have to bolt that turbo on....

Thanks,
Rod

I have a PERFECTLY good k24,exhaust AND intake manifold for sale....let me know