2.1 injection to carb conversion.

[escovedo]

I am converting my 2.1 dj from injection to carb
do I use my dj distributer which has no vacuum unit
or the 1.9 dg distributer.

[ajsimmo]

A DJ should have a dual vac dizzy. Are you saying you have no vac can on the dizzy? That sounds more like the MV unit, where the ignition timing advance curve is controlled by the ECU. If so, you should use the DG unit, but perhaps with a little more advance.

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[escovedo]

A DJ should have a dual vac dizzy. Are you saying you have no vac can on the dizzy? That sounds more like the MV unit, where the ignition timing advance curve is controlled by the ECU. If so, you should use the DG unit, but perhaps with a little more advance.

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Must be the MV unit on my van.
Would I leave the ECU in place and just plug 
in the DG distributer and fit the vac hoses required?
 

[escovedo]

Anyone using the Powerspark 034 SVDA distributer
which connects directly to the coil thus eliminating 
the ignition module or in my case the ECU, seems
like a simple solution if it works.

[ajsimmo]

A DJ should have a dual vac dizzy. Are you saying you have no vac can on the dizzy? That sounds more like the MV unit, where the ignition timing advance curve is controlled by the ECU. If so, you should use the DG unit, but perhaps with a little more advance.

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Must be the MV unit on my van.
Would I leave the ECU in place and just plug 
in the DG distributer and fit the vac hoses required?
 

If you have an MV dizzy, and no vacuum hoses, could it be you have an MV? Which ECU are you running? What I'm getting at is your running issues could be down to running an MV dizzy with an otherwise DJ setup?
I'm thinking you have recently acquired the van, and perhaps have yet to become fully familiar with its quirks. The running issues you have should be traceable and fixable without resorting to just putting a carburettor on it, which seems a retrograde step to me.

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[escovedo]

My mistake, I had assumed it was a 2.1 DJ but on checking the service book
it is a MV van, for simplicity I will convert to carb and run the Powerspark 
SVDA distributer which connects directly to the coil thus eliminates the ECU etc.
 

[Aidan]

Why are you changing from FI to carb ?

[escovedo]

Why are you changing from FI to carb ?

After many weeks of frustration trying to sort out 
my fi problems I decided to go back to the simple 
user friendly carb, which I have had many years of
reliable use on my previous van, basic diy simplicity
without all the 30 year old electric gizmo's.
Electrics have never been my thing.




 

[t25adict]

may be worth considering one of the weber kits that just camper sell if you have not sourced a carb. Weber carbs are quite tuneable so may help to get the best out of the 2.1 lump.

 we used a different kit that weber used to sell (may still do?) on a 2.1 some years ago and once tuned it was nice to drive.
 

[Aidan]

Why are you changing from FI to carb ?

After many weeks of frustration trying to sort out 
my fi problems I decided to go back to the simple 
user friendly carb, which I have had many years of
reliable use on my previous van, basic diy simplicity
without all the 30 year old electric gizmo's.
Electrics have never been my thing.

if you have been trying to sort the problems without actually knowing if you have a DJ or MV engine it won't have been easy. THE FI system is simple and ime fault finding isn't that difficult, especially on the MV, you just need to be methodical. It helps if you have access to a good running engine of the same type to be able to cross reference, and or swap out components temporarily to test them. 
If there is an intrinsic issue with the actual engine then swapping to carb won't fix that so make sure compression, oil pressure, and the integrity of the oil and water systems are checked as well.
 

[escovedo]

Thank you for your advice Aidan, the engine is in good
working order, oil pressure etc fine, coolant system 
in perfect order with no overheating or coolant loss.

[ajsimmo]

may be worth considering one of the weber kits that just camper sell if you have not sourced a carb. Weber carbs are quite tuneable so may help to get the best out of the 2.1 lump.

 we used a different kit that weber used to sell (may still do?) on a 2.1 some years ago and once tuned it was nice to drive.
 

No, no and thrice nay. Waste of money IMHO.
The guy is looking for reliability, and the Weber is a hateful thing that will probably never work well. I've thrown several in the bin for customers and replaced with the stock Pierburg - they've all thanked me.

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[ash1293]

Going to stick my head above parapet here and say some of us are quite happy with our webers.

Back when the conversion was using the 34Dat the stock supplied jets left awful flat spots and I constantly felt it was all or nothing.
Once re jetted it’s much smoother overall, plenty of drive ability, 18-22 mpg round town and up to 26-27 on a gentle run. This is a high top with a 1.9dg.


Better than a pierberg in good order? Probably not, but not necessarily worth ditching if it’s all you have.

Going to duck back down…….

[t25adict]

the weber kit we used was a weber designed kit not like the JK one.
jetting was not right and had to pay for rolling road time but it was Well worth it! ran very well.
used the standard airbox setup and fitted well with all the original pipes etc.  I have the same kit for a polo that I plan to install.
 

[ajsimmo]

Part of my disdain for the Weber is that they were also horrible to convert to LPG. Having only two of the original three studs to bolt the pancake down, they never sealed well which made them prone to air leaks.
On petrol the jets tended to gunge up regularly, and the operation was quite "binary" as has been mentioned. I thought the conversion kit had been discontinued some time ago, and that's the kit I refer to. If they have since released a new improved kit which is better then I'm glad (but I still wouldn't buy one).

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