Chevrolet s10 4.3

Did you find the exact position of the leak?

No, I see water coming down into the ashes, but am not sure where it comes from, I saw that it leaked from a nozzle, but have sealed this, do not know if all the water came from there.
Think it should be from the front edge because the carburetor is much warmer there than on the back, I’ll see if there is any water lost tomorrow.

What do you think about this, I took out the nozzles and started the pump, but then nothing leaks.
The car only runs on 5 cylinders on petrol and 6 on gas.

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When you say nozzles do you mean injectors?
If so a plugged injector?
Is this the intake manifold upside down?
Is that tar or wet soot?

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Yes, I meant injectors.
Cylinder 1 gets too much, so it extinguishes the spark plug, the spark plug becomes completely black.
You can see how wet it is on the left side, in the pipe down to the engine.
The picture is taken down towards the engine, the intake is off.
It’s sooty with gasoline, found an injector hose that was broken.

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That would probably explain your bad emissions testing.

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Yes, I think you’re right, I hope I can find new injectors with hoses.

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Shouldn’t be a problem. The 4.3 is a workhorse of an engine so I’m sure they still make legacy parts for it.

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Those early spider injection system were prone to breaking the injector lines, iv replaced many of them. As they heat cycle they get hard and brittle, I would think a good intake pop would break them pretty easily

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Fellows what he is showing you is the removed top of his intake plenum.

There is a all-in-one “central” SIX injector body in the center. That multi wire plug from the L.H. to the center goes to that.
Then pump pressurized fuel in&out to that in the larger lines lower R.H. side.
The actual solenoid allowed fuel to each intake port out through the smaller three upper and lower lines. The legs of the “spider”.
These lines have pressure release valve spray nozzles in their ends. Somewhat just like all old style mechanical diesels injection systems.
And these end of line nozzles can clog. No fuel to that cylinder. Not good.
Theses can dribble leak. Bad. Flooding and spark plug fouling. Worse. That empties the line with air from the solenoid valve to the line end. Next injector cycle then no fuel delivered. Just expelling air. Misfiring on that cylinder.

Typical GM of that era. Using formed hard plastic pressure and vacuum tubing in top of engine heat and oil vapors environments.
Just touching for other needed mechanical services and this aged plastics crack and break.

JanA. Only buy new replacements on these kinds of systems. You want as long of plastic service life as possible.

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Ok, it’s quite difficult to find something, tried to buy from Rock auto, but the return was too expensive, they wanted the old one and fix it.

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Jan I work at a General Motors dealership I will see what my price would be for one. If you could PM the VIN to me I could at least get a quote for a new unit.

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Thanks Cody.
Yes, it would be fun to see what a new one costs.

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Might be a case for a friendly mid-shipper, if customs would allow. I can get free shipping from Rock Auto, as can other people in the USA.

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The cost is so high because they want my core and repair it, double shipping.
Too bad I can’t find new hoses, I think that hade been enough.

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Jan, good thing our standard fuel is bullet proof :grin:

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Well, thank you very much. I had no idea what I was looking at and didn’t want to be the dumb ass that said so.

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How does it work with different height from nozzle to restriction. Does it not matter on how good or how much gas it gets?
Edit:Put in on.

Does anyone know how it works? I do not understand this, Kristijan has 1-2 “, JO has 12-14”, I have 4 ". Everyone works, so does it need more than at 2- 4 "?

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Gasifier building specifications:

If your motor is small or you prefer driving slowly - make a small gasifier.

If you have a big motor or you’re often in a hurry - make the gasifier big :smile:

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Yes, but does it have to do with the length between the nozzle and the restriction?
6000rpm on Kristijan’s car requires some gas too?
If you look at the Kelle generator, it do gas directly.
I do not understand how it works.

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