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Developed a misfire
https://www.ausmini.com/forums/viewtopic.php?f=2&t=91836
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Author:  Phil 850 [ Sun Feb 14, 2016 6:23 pm ]
Post subject:  Developed a misfire

My mini has recently developed a misfire on acceleration.
It seams to be getting slowly worse.
I pulled the plugs out and all were quite sooty except #4 which was dark tan on the electrode and insulator but sooty around the outside.
I've only been driving around the burbs so haven't been able to give it a real blast to heat it up significantly.
Plugs are BP5ES.
Any ideas :?:

Author:  kiwiinwgtn [ Sun Feb 14, 2016 7:37 pm ]
Post subject:  Re: Developed a misfire

Try swapping the coil to see if that makes a difference as well as the usual points, condenser and plugs

Author:  timmy201 [ Sun Feb 14, 2016 8:43 pm ]
Post subject:  Re: Developed a misfire

Check all the wiring to the coil too, if you have a loose wire or spade connector it'll give a dodgy spark

Author:  Convertible Mini [ Tue Feb 16, 2016 5:39 pm ]
Post subject:  Re: Developed a misfire

Start with spark plugs. Then leads. One thing at a time or you will not know what is causing it. Have a look under the bonnet with engine running IN THE DARK to see if there are any stray sparks.

Author:  Phil 850 [ Tue Feb 16, 2016 7:36 pm ]
Post subject:  Re: Developed a misfire

Checked the points for correct gap and OK.
Checked the plugs and they were a little big so I closed them up to 0.025" and then checked that all the leads/connections were tight.
Still had a miss.
Tonight I had a look in the dark and all was dark, as it should be :shock:
With nothing to loose I took it for another drive and the miss was still there.
With frustration :evil: I revved it out through the gears and it sort of felt a little better :|
So I repeated the above and eventually the cob webs were cleared and now runs great :D
Apparently it doesn't like being driven like Miss Daisy but more like, well 8)

Thanks for all the assistance
PHIL

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