Originally Posted by
RuiF1
Hi mate,
"Funny" enough, I've just posted a similar issue with my V8 on the forum.
I would definitely do a compressions test, it will tell you if you have a problem with a ring or valve. In the case there is one or two cylinder with a pre ignition pressure problem, you might need to go further and do a leakage test to identify the source of the problem.
Let us know if you find it. I'm off to change the leads on mine which is the only thing I haven't done so far...
Cheers,