Tuning 1.6 NA pumps?

[bc]

Long story short, pump developed a leak in the main top seal. I replaced it but ever since taking the top lid off I have not been able to get the engine to run right. Symptoms are, low power, excess dark black smoke, very stinky diesely smell, and no matter how many times I tweek the different screws, I can't get it to run right. it also has a rough idle coming off the freeway for about 20 or 30 seconds and then it smooths out and sounds normal And the timing is set too. It's just been doing this since I replaced that seal. anyone know how to set these pumps?

[Fatmobile]

Got a pump that increases the RPM when you pull he cold start handle?
It has a rod and lever setup running down behind the pump.

[bc]

not sure i understand your post fatmobile.

[TylerDurden]

not sure i understand your post fatmobile.

Later IPs have an idle speed linkage that connects to the cold start lever.

I rekon it might be worth seeing a pic of the pump... turbo/na version? (etc)

[bc]

this pump is na, and does not have the idle speed linkage.

[Fatmobile]

I know this is a new problem but running rough after coming off the interstate can mean a fuel line restriction when you are pushing it and calling for extra fuel. A dash-mounted vacuum gauge would let you know how hard the pump is pulling.
Do you have clear fuel lines?
Also wondering if you got the accelerator lever on the right shaft splines.

[bc]

If you mean the splines on the accelerator cable, this one doesn't have them. It's the older style off an '83 Vanagon. no clear fuel lines. everything was good untill i replaced that top seal. makes me think i didn't get the lever back on correctly.

[Fatmobile]

No I mean the splines that the accelerator lever slide onto.
Get clear fuel line to and from the pump.

[bc]

Yes, that's what I am concerned about, fatmobile. I'm not sure that I put the accelerator arm back onto the splines on the governor shaft exactly how it was before replacing the top seal. So the question is, how do I get it back to how it should be? There's three marks on the accelaretor arm and I have tried setting it back on to all three with the same result of excess smoke and lack of power.

[Fatmobile]

Sounds like you might have 2 problems.
Clear fuel lines to and from the pump. (The final post on many threads. Posts and problems continue but once they install clear lines they see the problem and quit posting).
Then find the spline.

[bc]

Thanks for the response, fatmobile. I did find one splitbin the outlet fuel line at the pump that was prob drawing air in. I don't currently have clear lines. As for the splines, I have tried every position on them with no luck. I'll test drive tomorrow and see if that leaky fuel line helped.

[greg lousy]

I don't currently have clear lines

I use material called "tygon" I think, and just leave it in. but regular cheap hardware store stuff is fine for temporary testing

[bc]

Well, I fixed the split in the return fuel line, however, I don't believe there is air in this system. This whole problem stems from me replacing the top seal on the pump and I obviously didn't get the top lever back in place correctly. I need someone who is good with tuning these pumps back to normal. I can take it to my local diesel specialist and have the pump put on a test stand, but I'm trying to avoid doing that. Is there anyone on here that knows how to set these pumps back to a normal setting?

[Fatmobile]

You problem might be obvious after spending $2.50 (plus tax) on 5 ft of 1/4" clear vinyl tubing from the hardware store. $2.75 and some time.
I'm not sure why it's such a hurdle to get people to install clear fuel line to and from the pump.

[bc]

It's just a pain in the butt to run a line from the pump to the tank. Doesn't it make sense that all air would be pressed and expelled out of the injectors? I don't see how air in the system can stay there. Especially after bleeding each injector just to get the thing to start. It should either be pushed out of the injectors or out and into the tank to be relieved out of the fuel tank pressure system. Either way, would air in the fuel system really cause a rough idle? Does air really build up in the pump? It should all be pumped out with the fuel! Is anyone on here knowledgeable on tuning these pumps back to a factory state?