https://vimeo.com/195414469

This miss is driving me nuts so before o knock on DRMini door has anyone got any ideas

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1968 Morris Mini Cooper S

Have you tried pulling off one plug lead at a time to see which cylinder is not firing

What plug leads are you running? If they are suppression type, put a multimeter on them to check resistance. bend them around and see if reading goes open circuit. If so it is toasted.
Anything over 5K ohm I put in the bin. New Bosch ones are 1.5-1.8 K ohm, GR's ones are lots less.
If buying new, get inductive core leads (Bosch, GR's etc), not graphited string (cheapies).

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

My car can't idle nicely under 1200rpmish?

Just up the idle to 1100-1200? (provided you check the leads etc as Kev is saying)

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Lillee - 1969 Morris Mini K

I'll check the cables tonight but I have upped the idle and adjusted the fuel mixer and this morning it was running like a demon

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1968 Morris Mini Cooper S

Or these are some others that I have

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1968 Morris Mini Cooper S

Or these are some others that I have




Red or Blue [FACE WITH TEARS OF JOY]

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1968 Morris Mini Cooper S

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1968 Morris Mini Cooper S

I like the wire cable type of lead, bullet proof...

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67 Deluxe
Dry suspension
1293cc, 11:1 comp, RE 282 camshaft, 45 Weber, extractors etc
4 synchro close ratio gbox
Cooper S brakes, no booster
Stealth box, as Doc says "goes harder and idles!"
RH tank cos I needed it crossing the Nullarbor etc..

Inductive core cable is good. It is similar to the shielding found in coax cable.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Well after a lot of tinkering "as my wife calls it" it's running a lot better but I still have a bit of pinging when it's under a bit of load

Also found a neat trick on YouTube on looking for escaping spark

Turn the lights out make the garage really dark. Run your engine get a spray bottle on mist and spray it over your leads cool and distributor to see if any sparks occur.
I found I needed to shield a couple of cables on my coil noticed they let off a couple of sparks. Love these little tricks

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1968 Morris Mini Cooper S

just retard it a bit...



that's a neat trick... might give that a go. I put my timing light on each lead and see if there are any gaps in the flashing

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did I tell you that I won a trophy?

Are you still running points? AFter installing electronic ignition I can wind mine down all the way to about 600rpm and it's still pretty smooth, but the alternator doesn't work at those speeds.

I have retarded it and pinging gone also happily idling between 800-900 rpm
Going NIcely now

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1968 Morris Mini Cooper S

What advance settings and curve are you running with?