difference between 1.9 and 2.1 dizzy

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ermie571
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difference between 1.9 and 2.1 dizzy

Post by ermie571 »

Hi,
I am confused now......is the 2.1 dizzy materially different from the 1.9? Or is it just the vacuum take off for the injection system (which, running on carbs I don't need)?

Happy to purchase it a new one if that's what it needs. But have other things I could spend the hardearned on!!! I know I asked this before.....but can't find the thread. :(

Think, IIRC, there are different advance curves.....or am I suffering from senile dementia again?? Checked vagcat and indeed, a different part number, but is the extra vacuum connnection only??

Thanks in advance
Em
x
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Aidan
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Post by Aidan »

it's possible that the vane unit for the hall sender varies, I can't tell from ETKA, and I haven't got a DG dizzy to check against the DJ one. Apart from the vaccuum unit though they look to be the same.
The vane is shown as seperate item but not detailed, it may be that that gives the timing map, I know the two 2.1 vane units are very different, but then the timing control is different, the ECU controls the timing more on the MV.

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Post by Simon Baxter »

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Post by toomanytoys »

cant see the page Si

I was led to belive the DJ dizzy has a different curve to the DG, but dont know for sure..

What do you mean "vacuum for the injection" as I was pretty sure they dont hav that, could be that its a dual vac (advance/retard) unit, if so the carb vac pipe needs to be connected to the outer pipe on the vac advance unit.

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Post by Simon Baxter »

Link works here?

Anyway, it's a dizzy repair kit, new hall sender unit.

It's under...

T3 >> Engine

With distributors getting harder to find, plus the possible implications of fitting the wrong dizzy I find this is the best solution.

I've fitted a few, bit fiddly, but if you don't feel confident doing it, then if the dizzy lands on my doorstep with a note to where to send it back to I am quite happy to strip and ultrasonically clean the dizzy, fit the repair kit, grease it all up and bob it back in the post.
I also have vac advance units for some engines on the shelf, so you can basically get a re-con dizzy.

hall sensors aren't cheap, plus these are genuine bosch, but they work.

I've had one recently that caused all sorts of headaches, it had a flatspot, and I've never known a Hall sensor to cause a flat spot but it did, stupid thing was that everything we did on the way to finding the fault made a noticeable difference to how the van ran.
First was coil, started better, then ign module died, I presume due to the shock of having a proper coil, leads were shafted anyway, all earths where knackered... ran great in the end!
lesson learnt, hall sensors can cause flat spots!
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Post by ermie571 »

Thanks folks for the advice.

I have a flat spot in second.

I also have a spare 1.9 dizzy. By all accounts that should be fine. But will get it checked properly at 500 mile service. It din't have a flat spot before the new engine....which was timed for LPG. Now running on mixture unleaded/super....another lot of super going in shortly. Running better.

Have also been advised on a potential leak on the carb which I shall investigate, so not 100% convinced it is the dizzy.

Thanks for all the comments....useful info that may be required in the future. Thanks also to Baxter for offer of fitting said repair kit!

cheers
Em
x

ps - only another 200 miles and the first 500 are complete...Oh - link worked for me as well?
2.1 DJ 1990 Caravelle (died and gone to heaven)
2.0 AGG (1997 ish) 1984 transporter LPG

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Post by toomanytoys »

Can see it now!!!!!!!

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