Vacume advance with Lumenition Ignition system???

[Moraystag]

Gent's does the vacume advance become redundant once Lumenition system is installed.
Sorry if this may seem a daft question, but during my tune up last Friday the guy who did this for me said that my vacume advance was shot.
Had my mate up this evening with his wife for a social call, and I mentioned this to him. He was under the impression that the vacume advance was not required if Lumenition was installed. I could'nt disagree as I really don't know.
Any advice on this one??

Mike

[martin]

Hi Mike, not a daft question at all. Yes, you do need the vacuum advance, the Lumenition, or any electronic setup, takes care of precise timing and allows for wear, but doesn't replace either the vacuum or mechanical advance. Easy, relatively cheap fix, it just means there's a small hole in the advance diaphragm, so you need a replacement. The car will continue to run quite happily, with a bit less power until you can sort it out, no damage will be done. Martin.

[nib]

Hi Mike
I think this seller on ebay had one for sale new old stock for a reasonable price,might be worth emailing him to see if he still has it.
Mark

http://stores.ebay.co.uk/POPYS-OLDSHOP?_trksid=p4340.l2563

[Moraystag]

Thank's guys, will address the vacume advance shortly. I'm just thinking that with the V.A. not functioning will this cause me to use slightly more fuel??, me thinks that it should. What do you think??

Mike

[jleyton]

Morning Mike

Good news is that, yes it may cause you to possibly use a bit more fuel but the bad news is that I would have thought it would be an almost imperceptible amount.

But working in the oil industry, can't you get petrol at staff prices? LOL

Cheers

Julian

[DJT]

But working in the oil industry, can't you get petrol at staff prices? LOL

Ha! Ha! B***dy Ha! I wish. I have been working for one sector of the oil industry or another since 1969 and still have to pay the same as everyone else
Happy Easter

[Moraystag]

Yes ditto, what a bloody laugh, however, next time you put a tiger in your tank think of Dave an I LOL LOL

[flying farmer]

A shot vacuum advance can make a huge difference to fuel economy, I don't know just how much advance the rover vacuum advance module gives, but 20 degrees is not uncommon at high vacuum (low engine load). Try retarding your ignition timing 20 degrees and see how well it runs.
The vacuum advance doesn't do anything at full throttle or at idle, so it is not difficult to miss the gradual deterioration of a faulty unit

[Colonel Mustard]

I agree with the flying farmer...many years ago I noticed a slight drop in power and a worrying increase in fuel consumption on my Volvo 740 automatic (which didn't have a lot going for it in the fuel consumption department anyway). I traced the fault to a hole that had worn through the vaccuum advance pipe where it had been rubbing on the inlet manifold. Replacing the pipe got me an extra 2mpg.

A quick test of the VA unit would be to pull the pipe off at the carb end and suck hard on it. I did this when I serviced my Stag last Month and with the dissy cap off I could see the baseplate move. Had to suck very hard but it was reassuring to know it was all working. (if you can suck air through it then the diaphragm is holed)

Chris

[Mike J]

I have the same set up with luminition and my advance only moves a max of 2mm is that right or should it be more than that. Mike

[flying farmer]

I have just tried sucking on a spare vacuum advance unit (God I do some weird things)
It seems to move about 2-3 mm, but I am not sure if it is a stag unit
If you can feel it reaching the end of its travel, and it is not leaking it is probably ok
Neil

[edd]

Some great tips from yester year thanks guys .Just shows looking in the history is very handy .
Edd

[DaveP]

Old post I know but may still be relevant to people. In the instructions it states, Lumenition ignition kit FK113 for Stag will not have long pin for vacuum advance, so does that mean that it does not support or require vacuum advance FK113-installation.pdf

[Lingen]

Dave.
No. It means they just don't supply them. The vacuum advance is still needed and you should be able to re-use the pin/screw.. You may find it has worn where the diaphragm operating arm has cut in to it. If you can't obtain a new one, then you might get away with installing the old pin in a different rotational position, and securing it with a drop of Loktite.
Mike.

[jbuckl]

I was sent a distributor to repair that had been previously been supplied by a respected specialist. & hardly used.
I found the internal plastic thrust bearing was broken & the vacuum linkage was unable to operate because the baseplate hole was incorrectly made ( location ) in the (new) baseplate. Disgusting as it had apparently been sold by a specialist for £300, apparently.
fixed & returned for postage.