|
|
Post by roblee on Jul 2, 2007 19:43:57 GMT
anyone able to explain why each spark plug i pull out is comletly different in colour (i.e 1 is pure black, one is white, and the other 2 are shades of grey).
Rob
|
|
|
|
Post by Miniböttcher on Jul 2, 2007 20:42:14 GMT
best to check the gap on your spark plus to make sure you getting the a good spark, haynes manual has the right gap size can not remember it off hand,
it could be bad mixture and timing.
go back to basics and start from there 90% of the time its something simply are something you have over looked.
a good tool , i have never used it is a colour tune, its a spark plug adapter where you can see the colour if the spark and the moment it goes bang, then you adjust it to the right colour this sets up your right mixture
like i said i have never used it so i am not 100% how it works.
dean
|
|
|
|
Post by roblee on Jul 2, 2007 20:57:18 GMT
shouldnt they all be the same colour regardless of the mixture?
|
|
|
|
Post by Simon1275mpi on Jul 2, 2007 21:14:40 GMT
Relax, as long as there are not melted or damaged!! Each chamber will be slightly different. Because of the shared intakes the inner cylinders normally run hotter, then introduce a little accelerated wear in one component and its all change again. Check out this link. www.spark-plugs.co.uk/pages/technical/diagnosis.htmIf your really worried, start as Dean sad, with the basics. Setup the points and gap on the sparks. Question is??? does it run okay, any problems? Then look at service, cap, points, condenser, coil, leads and plugs. But does it run okay?? The best option to get over to Gerald Dale and spend £50 to get it on the rolling road to set everything up and point out any problems. Think of it as a health check and ending up with an engine at its best. I've seen 50% increases in power!!! Gerald has saved at least two club members from lean carburettor mixtures melting pistons in the last 12months!! or PM Minihaven (Shawn) for some good advice and possibly a good rate on a visit. |
|
|
|
Post by MiniHaven on Jul 9, 2007 7:14:45 GMT
thanks simon appreciate the plugs mate lol
|
|
|
|
Post by Stephen on Jul 9, 2007 9:43:25 GMT
shameless plugging! and heres mine (kindof) Buy yourself a colourtune from halfords and a timing light while youre at it so you can set it up yourself, cost about £10 for a color tune and £30 for a timing light. still thats never as good as a good rolling road session but cars can go off tune after a bit of mileage anyway
|
|
|
|
Post by Simon1275mpi on Jul 9, 2007 15:56:14 GMT
Did Roblee get in touch with you then Shawn? Colour Tune.... nice piece of kit  . I used it on the Duckling. But I've since found listening to the tone of the engine as the idle rpm changes with the change of the mixture screw is faster and more effective. Plus the tone/rpm applies to all four pistons where as the colour tune is one piston at a time. But thats my DIY  |
|
|
|
Post by Stephen on Jul 11, 2007 12:19:57 GMT
true, but you are supposed to try an inside cylinder and then an outside to make sure its accurate
Depends how old ur colour tune is really, mine has some handy set up instructions not just for the idle
|
|
. I used it on the Duckling. But I've since found listening to the tone of the engine as the idle rpm changes with the change of the mixture screw is faster and more effective. 