missfire between 3800 and 5000 rpm?
Turbo Mini Forums

Can you bend the sensor bracket or shim it with washers so the sensor runs over the un-"damaged" part of the rogue tooth - I'm assuming from your description the low bit is "sideways".

Schrödinger's cat - so which one am I ???

Good idea Rod, I can certainly give that a go.

Keep an eye on this:

http://www.msextra.com/forums/viewtopic.php?f=101&t=36420

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

The problem is, my rogue tooth shows up at all RPMs, it just only seems to affect it heavily when the engine requires more precise spark control.

It also makes it hiccup when it starts as it picks the rogue tooth up and fires the spark off too early when cranking, causing it to stumble when trying to start, so this tooth is clearly affecting the spark timing, just not as much at idle and cruise RPMs for some reason.

I do wonder when I get the VR sensor moved, whether the BTDC timing for the missing tooth will have to be altered, because its way out at the moment (62 degrees, as apposed to around 90 which is what MJLJ found acceptable), and i suspect that the sparks are being called off the rogue tooth, and it is ignoring the missing tooth somehow.

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

Ah I completely forgot about picking one up today, and yesterday. I'll have to try and get one tomorrow.

no sweat :) like i say if you have found a physical trigger for your odd tooth thats your culpret there, but it should never cause resets, only things that can do that are interuptions or spikes in the processors power supply! :) not fun to troubleshoot!

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

Gone back to coil and points for the meantime whilst this gets sorted out.

I managed to twist the bracket by hand today and get the VR sensor sufficiently away from the defect in the wheel (roughly 5mm from the edge of the sensor), but the phantom tooth is still appearing to my annoyance, so there's a gremlin somewhere else in the system. I'll carry on trying to solve the problem but I'm quickly running out of time as I'm moving away from Devon again next week, which is where all my tools are.

I've been at a mate's house all day today so I will see if maplin are open tomorrow, i believe the exeter branch is. I cant think what else it would be if this cap doesn't solve it, but I will continue to head scratch untill I think of something.