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IDI Engine / Re: Please help me get my JX 1.6TD running!
« Last post by RabbitJockey on May 22, 2024, 11:53:43 am »there should always be fuel flowing through the return, the pump needs that flow to cool itself.
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IDI Engine / Re: Please help me get my JX 1.6TD running!
« Last post by fatmobile on May 22, 2024, 08:18:24 am » There should be fuel returning even at idle.
There is a restrictor in the OUT bolt that can get clogged.
In fact the hole in that bolt is so small you might have a hard time finding it.
There is a screen inside the bolt that is supposed to keep that hole from plugging but it doesn't always work.
You should try backflushing it.
Or vacuum from the end of the bolt, or both.
I still think your problem is retarded timing but no flow from your pump will be your next problem once timing is right.
There is a restrictor in the OUT bolt that can get clogged.
In fact the hole in that bolt is so small you might have a hard time finding it.
There is a screen inside the bolt that is supposed to keep that hole from plugging but it doesn't always work.
You should try backflushing it.
Or vacuum from the end of the bolt, or both.
I still think your problem is retarded timing but no flow from your pump will be your next problem once timing is right.
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IDI Engine / Re: 1.9 diesel parts book
« Last post by cdsx on May 22, 2024, 05:04:06 am »I checked them out and they do have an extensive parts catalogue, certainly, but that's no replacement for an actual parts book. That shows every individual part, its' part number, and different applications. When the workshop manual is vague, lacking illustration, or just plain glosses over something (Are you listening, Haynes?), the exploded view in the parts book can clear up a lot of confusion. Just check out a couple of pages of a Volvo 240 parts book and you'll see what I mean. (I would have supplied an illustration to sell my point, but for some reason, this forum won't let me post an image.)
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IDI Engine / Re: Please help me get my JX 1.6TD running!
« Last post by ORCoaster on May 21, 2024, 09:56:54 pm »By all technical means you are timed at 89.8 mm. note the small dial and you have two more increments to go before you hit. 90 mm, I know it is tough to get it spot on but that is where you are at.
Since it is only at idle I would say no fuel return to the bucket is probably expected. Rev it up to 15 or 1800 and see what pumps through it.
Quite the clacker I say. Almost like it was over-timed. Oh wait, that is with the CS knob out, so that adds a few degrees advance to the system. Now how many MM is that? I don't remember. Dang.
Keep at it. and check that alternator support bracket for cracks, it looks wobbly to me, I wouldn't like to run it that way.
Since it is only at idle I would say no fuel return to the bucket is probably expected. Rev it up to 15 or 1800 and see what pumps through it.
Quite the clacker I say. Almost like it was over-timed. Oh wait, that is with the CS knob out, so that adds a few degrees advance to the system. Now how many MM is that? I don't remember. Dang.
Keep at it. and check that alternator support bracket for cracks, it looks wobbly to me, I wouldn't like to run it that way.
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IDI Engine / Re: Please help me get my JX 1.6TD running!
« Last post by ghostrider2 on May 21, 2024, 12:28:06 am »Here's the photos and videos as promised now:
Here is a photo of the injector pump timing set to 0.9:
https://share.icloud.com/photos/064BC4MzcBHpJ-pwJGzne6cqQ
Here's a video of the engine running and (you can't see it) but I push the cold start cable in and it stalls out. Please ignore the unfortunately timed air compressor turning on right at the end. You'll also hear my garage mate spraying the compressed air in the background (that's not my motor!)
https://share.icloud.com/photos/03fCAdrAbU6B01hHT0huztHBQ
And here's a video of it running roughly and you can see the bypassed fuel system. Is it curious no fuel is coming out of the return line?
https://share.icloud.com/photos/0a9Tmg8i1T0ZJb6v9h6M-1vEw
Here is a photo of the injector pump timing set to 0.9:
https://share.icloud.com/photos/064BC4MzcBHpJ-pwJGzne6cqQ
Here's a video of the engine running and (you can't see it) but I push the cold start cable in and it stalls out. Please ignore the unfortunately timed air compressor turning on right at the end. You'll also hear my garage mate spraying the compressed air in the background (that's not my motor!)
https://share.icloud.com/photos/03fCAdrAbU6B01hHT0huztHBQ
And here's a video of it running roughly and you can see the bypassed fuel system. Is it curious no fuel is coming out of the return line?
https://share.icloud.com/photos/0a9Tmg8i1T0ZJb6v9h6M-1vEw
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IDI Engine / Re: Please help me get my JX 1.6TD running!
« Last post by ghostrider2 on May 21, 2024, 12:26:35 am »Thanks y'all. That's encouraging because adjusting pump timing is something I know how to do now! 
And, yes, it has a turbo. Just the standard VW version though. Nothing fancy.
And, yes, it has a turbo. Just the standard VW version though. Nothing fancy.
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IDI Engine / Re: Please help me get my JX 1.6TD running!
« Last post by ORCoaster on May 20, 2024, 09:49:38 pm »I would like to see you bump that pump to 1.25 and see what it does. Is this an engine with a turbo? Those should have 155 bar injectors so you can overcome some of the extra pressure that comes with increasing the air into the cylinder. At the same time, you have increased the pressure and you need to inject the fuel earlier so it will take advantage of the increase and force that piston down sooner and you get the benefit of the extra power.
That is what I have going in the 1.6 diesel with a turbo on my PU and it seems to do better than if I run a standard 90 or an enhanced 1.05 mm timing.
That is what I have going in the 1.6 diesel with a turbo on my PU and it seems to do better than if I run a standard 90 or an enhanced 1.05 mm timing.
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IDI Engine / Re: Please help me get my JX 1.6TD running!
« Last post by fatmobile on May 20, 2024, 12:01:13 pm » I think your instincts are right.
The cold start lever is a great indicator of how well the timing is set.
I don't think .9 is the recommended setting.
At least around here it's closer to 1.
The cold start lever is a great indicator of how well the timing is set.
I don't think .9 is the recommended setting.
At least around here it's closer to 1.
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IDI Engine / Re: 1.9 diesel parts book
« Last post by Dennis Froelich on May 20, 2024, 09:07:29 am »Even though they aren't the best place, PartsPlaceInc out of Michigan is probably the only place I think is available to find info on 1.9 IDI engines
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IDI Engine / Re: 1.9 diesel parts book
« Last post by cdsx on May 20, 2024, 07:19:43 am »Well, it appears my success was short-lived. After 84 views in 5 days, I'm sure someone would have mentioned a parts manual if one existed. Very disappointing.
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