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Post by andygasgas on Jul 2, 2014 15:20:09 GMT 1
Hello all tried again today to sort out fuel problem with 4lo it has 31k carbs it starts fine ticks over fine and up to about 6000rpm is a bit smoky then the right hand cylinder cuts out until you drop revs then it starts again  struggling to say the least any ideas ? |
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Post by looey on Jul 2, 2014 15:32:50 GMT 1
Is it more smokey on the right cylinder and fouling that plug ?.
That would be crank seal letting geabox oil into the right cylinder ?.
What are the plugs like if you take them out directly after it drops to one cylinder ?.
Is the right hand plug dry or wetter than the left plug for example ?.
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Post by andygasgas on Jul 2, 2014 16:07:56 GMT 1
It's is more smokey on right hand cylinder but starts fine and is ok until 6000rpm then cuts to 1 cylinder as soon as rpm drops runs on both again
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Post by looey on Jul 2, 2014 17:23:04 GMT 1
If it's more smokey on the right cylinder then it could be the crank seal.
Is it the same colour blue smoke from both sides or is the right hand side smoke a bit more white in colour ?.
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Post by martyngsxr1 on Jul 2, 2014 21:34:30 GMT 1
Had the same sort of thing on my lc2 turned out to be a duff cdi unit
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Post by ianr4863 on Jul 2, 2014 21:59:55 GMT 1
+1 for possible electrical fault .
Have you tried swapping the HT leads ?
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Post by andygasgas on Jul 3, 2014 21:21:25 GMT 1
Problem sorted while I was away a friend fitted a metmachex swing arm and had trapped a breather pipe lol he's pretty embarrassed to say the least it's running fine now thanks
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Post by looey on Jul 3, 2014 22:41:00 GMT 1
Nice one, that's a nice easy fix for once  |
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Post by andygasgas on Jul 4, 2014 8:18:13 GMT 1
Thank looey it was only after exhausts and carbs were taken off I noticed it lol
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struggling to say the least any ideas ? 
