E30 M3 pinking...

After the starter motor saga (see separate thread) the car's back on the road and it passed its MOT yesterday

Yippee - not having driven it for a while and not having much time I took it for a gentle trundle around Richmond Park with the sun roof open

Negotiated a speed bump in the usual way and not having driven the car for a while forget how much you need to stir the gear lever on these cars .....damn thing starts pinking

Now it seemed to stop very quickly but I thought anti knock sensors stopped detonantion long before it is audible

Is there an anti knock sensor connection I might have disturbed whilst changing the starter??

It's an Evo Sport so always run on ordinary unleaded - never had pinking before but then agai I've hardly ever had the sunroof open....

Any ideas anyone??

Cheers

Anti-Knock ! blimey if anybody could get that to work on the S14 engine,
give them a medal.

These cars never had anti-knock, wouldn't work anyway.

Suggest you have bad fuel. Try using super. My engine for eg, runs so much
better on ESSO super than anything else.
I too had a pinking issue once with Optimax!

My dad had a little pinking but this was the day after filling up with diesel. Use the best  petrol you can find

space shuttle was designed in the 70's

Hate to say it but old Montego and Meastros had knock sensors back in 1983/4! The ECU's would constantly run as much ignition as possible untill it detected pinking, then back it back for a few revolutions, then creep back up again.

They were all full of nastyness!

EDIT: Jonners, maybe you should have crushed the banger!  As others have said, I'd try different fuel first, but run it out of the old fuel before you do and change the fuel filter aswell.

Edited by SHEPSM3

UweM3 wrote: SHEPSM3 wrote: Hate to say it but old Montego and Meastros had knock sensors back in 1983/4!  Go and buy one if you are loving them so much. But they didn't come with an anti cry sensor    The M3 therefore comes with a ear to ear grin sensor ...and somebody who could manage in 1986 to squeeze almost 85bhp/liter out of a (reliable!!) production engine doens't need a knock sensor, don't you think??

 Not loving the Maestro/Montego but loathing them, I wouldn't have one of those if it was given to me (Maestro MG Turbo with zero miles perhaps, but even then it would be rotten out ). They were truely full of NASTYNESS!

Thats great news! Cheap repair!