Lumenition alignment

[davidf]

Has any one else had problems with the alignment of the Lumenition unit?
When I first fitted mine (2 years ago), it didn't work. I found that the rotor was not splitting the beam. I managed to get it to work by loosening the fixing screws, and forcing it towards the distributor spindle, taking up all the available tolerance in the holes.
Recently, the Stag has been missing under load, and I realised the tacho was flickering at the same time, so I concluded that the movement of the distributor baseplate by the vacuum advance was enough to stop it breaking the beam.

I have now opened up the mounting hole (see picture marked with arrow) to allow it to move nearer the spindle, and it is OK.

Has anyone else had similar experience?

By the way, my original installation was with a slightly worn original baseplate, and then I had the same problem again when I fitted one of LD Parts new baseplates, so I am convinced there is nothing wrong with the baseplate.

Lumenition clearance.jpg Lumenition Mounting hole.jpg

[Mike J]

I have the same unit. Does your dizzie have a micro adjuster? This will make a difference. Either has to be wound full in or out can't remember which. My unit seems to be ok. Mike

[4x4]

My misfire, with similar symptoms - was a loose connection on the connector between the optical pickup and the unit itself. I isolated it to the point where even very gently touching the right (or wrong depending on your viewpoint) wire would upset the tickover. Simple case of male pin in tired female connector - which I just pinched up a bit and then it was fine. My idea was that under load the engine rocked enough to tug the wire.

[Westfaling]

David
Might be a silly question but are you sure you got the right unit for the Stag distributor? I've just re-installed mine and it seems to work fine.
Nick

[davidf]

David
Might be a silly question but are you sure you got the right unit for the Stag distributor? I've just re-installed mine and it seems to work fine.
Nick

Interesting question, but it was ordered for a Stag, and the product code checked out.

[davidf]

I have the same unit. Does your dizzie have a micro adjuster? This will make a difference. Either has to be wound full in or out can't remember which. My unit seems to be ok. Mike

Do you mean a timing adjuster, like for example the 1960's minis? - No, I didn't think any Stags had these. Would love to have one! So much easier than moving the body of the dizzie!

[Bob Heritage]

What is the number on the box of the dizzy chopper?

[MB]

My chopper looks different to yours, but it is older and has seen a lot of action

Lumenition.jpg

[davidf]

My chopper looks different to yours, but it is older and has seen a lot of action

Interesting, and thanks for your photo - your chopper goes much deeper into the aperture of the sensor than mine. Strange thing is, I have a very old chopper from a previous car (20 years old?); completely different design, it is a metal pressing, but is the identical diameter. I will measure the diameter of mine when I am back home, and report again. Could you meausre yours?

David

[MB]

About 60mm

Lumenition_60.jpg

[davidf]

Yes, just measured mine - also 60mm, so still no idea why my alignment is so close to missing the beam.
Anmyway, thanks to all for their thoughts and information.