rubbish rotor arm = random misfire?? pictures here...

[sprevett]

spot the cheap/nasty one? other, thicker one bears the Lucas name and has apparently cured dreaded random misfiring...although I did replace the dizzy cap too so I might be jumping to conclusions...but has anyone else got exprience of these rather cheap looking (Italian) rotors?

[rev-erend]

It has indeed been an issue for quite some time.

Check on ebay for old lucas stock - it often sells at more than you expect because it actually works well.

Most reputable sources of TVR parts manage to find good quality parts though.

There was also more than 1 version of cap / rotor arm too .. to confuse things.

[B-Reight]

Problem with ebay is a lot of the rotors sold as Lucas are in fact pattern part crap in a Lucas box. Apparently the rights to use the box/branding were sold to 4 different manufacturers so it can be a lottery getting a decent part.

[adam quantrill]

Why not put the arm back in to see if it was the arm, or the dizzy cap ;^)

[broadside]

See my other thread, Greenstar TVR and a fab day. As I mention in that my 450 was running like a bag of spanners despite having a rolling road tune up last year. The guys at Greenstar replaced the rotor arm with a genuine Lucas one. The one I had in was a generic Halfords / motor factor one. Apparently they are not as tight a fit inside the distributor as the Lucas and this can move the timing fractionally out and if you think about it, the thinner metal of a the generic version won't transmit a spark as well as the thicker Lucas. It's something I had never thought of before, but now that Greenstar put a Lucas one on and the 450 is running sweetly, I will never use a generic rotor arm again.

[ed_crouch]

MS2Extra.

[B-Reight]

up & running with MS now ed?