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Home > Help Needed / General Tech Chat > Occasional misfire.

steve1275

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Bromsgrove

23rd Jun, 2013 at 08:30:00am

Another of those annoying problems.On a run in town,ie light load,low rpm,I get a sudden momentary loss of ignition/loss of tacho feed.Running megajolt,swopped out all the usual suspect components.Doesn't happen under real power but still not good.Why would an apparent electrical problem be load sensitive?Any thoughts,comments,jokes welcome.

'Where does the engine go?'

Brett

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Doncaster, South Yorkshire

23rd Jun, 2013 at 09:34:10am

Hmmm usualy the load sensitive misfires or breaking down of the coil packs would start to fail a higher loads
Have you checked the crank sensor for dirt?
I had an issue on my mini but rpm dependant, turned out to be a vibrating belt tapping the crank sensor maybe something has worked loose?

Yes i moved to the darkside *happy*

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BENROSS

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Resident Cylinder Head Modifier

Mitsi Evo 7, 911, Cossie. & all the chavs ...... won no problem

23rd Jun, 2013 at 09:35:52am

Main live, to All Electrics a touch loose Steve recheck.

tadge44

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Buckinghamshire

23rd Jun, 2013 at 11:23:34am

I had a very similar problem some while ago - your comment of the loss of tacho feed alerted me, rather than the ignition cutting out.

Mine turned out to be the loose fit of the plug into the EDIS - the retaining clip was long gone, of course.

Happened on the way to a hillclimb when it first occurred - doom and gloom for about 15 mins !

steve1275

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Bromsgrove

23rd Jun, 2013 at 06:33:50pm

Ok,thanks guys,gives me a to do list,I'll report back in due course.

'Where does the engine go?'

apbellamy

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King Gaycharger, butt plug dealer, Sheldon Cooper and a BAC but generally a niceish fella if you dont mind a northerner

Rotherham, South Yorkshire

23rd Jun, 2013 at 06:34:54pm

The only suggestion I have is to run it at full chat at all times. No low load use, so no misfire.

On 11th Feb, 2015 robert said:
i tried putting soap on it , and heating it to brown , then slathered my new lube on it

*hehe!*

tadge44

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Buckinghamshire

23rd Jun, 2013 at 07:35:18pm

Sounds sensible to me.

steve1275

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Bromsgrove

23rd Jun, 2013 at 09:28:17pm

Knew I could rely on a tyke to come up with that one (speaking as a yellowbelly born and bred) *Punch*

'Where does the engine go?'

apbellamy

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16540 Posts
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King Gaycharger, butt plug dealer, Sheldon Cooper and a BAC but generally a niceish fella if you dont mind a northerner

Rotherham, South Yorkshire

24th Jun, 2013 at 07:04:00am

*happy*

On 11th Feb, 2015 robert said:
i tried putting soap on it , and heating it to brown , then slathered my new lube on it

*hehe!*

steve1275

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Bromsgrove

25th Jun, 2013 at 04:35:27pm

The fan belt is a bit loose,now tightened.There doesn't seem to be a loose power feed,but the EDIS plug is a bit wobbly.Fitted a spare one which is a bit tighter,but will probably finish up swapping the connector.GRRR,only 11 wires then......
Will try it again tomorrow first.

'Where does the engine go?'

steve1275

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Bromsgrove

26th Jun, 2013 at 09:20:04pm

Seems OK now,and I think your loose belt idea may be the problem Brett.Before tightening the belt could hit the sensor holder and being on the slack side of the belt run might vibrate.There were some bits of black material on the sensor holder.
So thanks again guys,another lesson learned!

'Where does the engine go?'
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