Evening all
The saga of the Green RR continues. I have abandoned solving the rumbling/whining noises from the front end in favour of this (new) problem:
Idles OK-ish at about 750-800. As the engine speed increases it's apparent that the engine is running less smoothly than usual, a sort of 'roughness about the edges'. As the speed increases the roughness becomes more pronounced and can be felt through various attached items e.g. transfer box selector. It reaches a peak at around 2,000 RPM, when it could almost be described as a vibration, and then gradually decreases.
It feels a bit like a gentle - as in quiet - misfire.
I wondered if the ignition advance had died but Mr Gunson's Tachostrobe indicates that there is some advance in the ignition timing as I rev the engine. I'm not convinced that the vacuum advance is working cos I can suck on the vacuum tube without effort. I was tempted to remove the transparent cover from under the rotor arm to look at the vacuum advance. Is it worth it?
Incidentally what should the timing be set to?
Also can I, if necessary, use the vacuum advance from a 1988 3.5 EFi RR?
TIA
Richard