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Engine dying at idle (in wet?)

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teamster1975
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Solved Re: Engine dying at idle (in wet?)

Post by teamster1975 on Tue 17 Feb 2015, 3:57 pm

Excellent post Michael, I enjoyed that! Laughing
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louis_sutton
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Solved Re: Engine dying at idle (in wet?)

Post by louis_sutton on Wed 18 Feb 2015, 1:02 am

Is now a bad time to point out it's definitely water causing my problem?Razz
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Flyingbrick
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Solved Re: Engine dying at idle (in wet?)

Post by Flyingbrick on Wed 18 Feb 2015, 8:20 am

You told us so, indeed Wink
What about my hint regarding the side stand switch?
Does "definitely caused by water" mean that you have located the fault?
Or is it only "damn, every time this problem occurs it's raining as well"?

Regarding the CB, there aren't many faults caused by water. But until now, I haven't read about your fault diagnostics, just about how annoying the fault is. So, while you're searching, we'll waste our time with the theoretical aspects of carburettor cleaning, if you don't mind...Laughing
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Stooby2
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Solved Re: Engine dying at idle (in wet?)

Post by Stooby2 on Wed 18 Feb 2015, 9:47 am

I'd be looking at the coils, HT leads and plugs tops if I was having this problem.  It sounds like a weak spark issue to me. If it were a carb problem it would likely happen all the time, not just in the wet.

Check the coil and the connections to it, both the HT lead and the 12v. Then closely examine the HT leads for splits, cracks or damage. Same with the spark plug caps. 

If all is good there then try working back down the ignition circuit, checking for damaged wires, poor connections etc. This really sounds like an electrical problem rather than fuel.
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louis_sutton
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Solved Re: Engine dying at idle (in wet?)

Post by louis_sutton on Wed 18 Feb 2015, 10:13 am

Don't mind at all Michael, I was just feeling mischievous. Initial checks show no pipes appear to be  leaking, side stand switch is fine, and bike has been fine on my daily commute this far in the dry.

That said, circumstances have conspired to change priorities... A leaking radiator takes precedence! That first, then I'll strip the leads and plugs methinks.
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eternally_troubled
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Solved Re: Engine dying at idle (in wet?)

Post by eternally_troubled on Wed 18 Feb 2015, 12:55 pm


So, again, why should someone recommend coke instead?



I don't really know either.  I suspect it goes something like this:

1. Get dirty old bike that kinda works.

2. Take it all apart and clean stuff up, including removing the carbs.

3. Dunk carbs in Coke (because you have always done this), clean them up etc.

4. Put it all back together and sort things out (change oil, do valve clearances, new spark plug, new petrol, new filters, tighten chain, fix brakes etc etc)

5. The bike works better than it did, so you assume it is the coke.  You then go around telling everyone to clean their carbs with coke :)


that, or they are taking the piss...

--

For the record, I agree with Michael; brake cleaner sprayed through the various holes and so on works well as a quick(ish) cleaning method (I have done this on other bikes as I don't own an ultrasonic cleaner).
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Flyingbrick
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Solved Re: Engine dying at idle (in wet?)

Post by Flyingbrick on Wed 18 Feb 2015, 4:13 pm

Sounds like a plan to me... Wink
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louis_sutton
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Solved Re: Engine dying at idle (in wet?)

Post by louis_sutton on Fri 28 Aug 2015, 12:05 am

Sorted. New ht leads, and a fenda extender, just to make sure!
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Alvi
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Solved Re: Engine dying at idle (in wet?)

Post by Alvi on Fri 28 Aug 2015, 9:06 pm

Glad you got it sorted, but how did you replace the ht leads? I thought they were crimped  & sealed. I haven't looked closely, but most coils seem to be made that way. It would be good to know it can be done.
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ANDYC
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Solved Re: Engine dying at idle (in wet?)

Post by ANDYC on Sat 29 Aug 2015, 9:56 am

Alvi wrote:Glad you got it sorted, but how did you replace the ht leads? I thought they were crimped  & sealed. I haven't looked closely, but most coils seem to be made that way. It would be good to know it can be done.



I eliminated this weak link by switching to a COP (coil on plug) system.
It gives a much stronger spark, lighter and no HT leads to fail.
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louis_sutton
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Solved Re: Engine dying at idle (in wet?)

Post by louis_sutton on Sat 29 Aug 2015, 10:03 am

Alvi, really sorry mate, I bottled it and gave it to my spanner to do. I couldn't afford any time to work on it. £60 to replace the leads and rip the restrictor plates out. I've not had a chance to have the tank off and inspect his work yet!
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Alvi
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Solved Re: Engine dying at idle (in wet?)

Post by Alvi on Sat 29 Aug 2015, 8:29 pm

Not to worry, not had a problem yet, just one of those 'what if's in the back of my mind. Coil in plug conversion sounds interesting, I'll do some googleing.....
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eternally_troubled
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Solved Re: Engine dying at idle (in wet?)

Post by eternally_troubled on Tue 01 Sep 2015, 1:04 pm


Alvi, really sorry mate, I bottled it and gave it to my spanner to do. I couldn't afford any time to work on it. £60 to replace the leads and rip the restrictor plates out. I've not had a chance to have the tank off and inspect his work yet!

If you look here:

http://www.lingshondaparts.com/honda_motorcycle_parts_selection_pfk.php?block_01=13MY5WEA&block_02=F__2700&block_03=1612

the diagram suggests that you can buy the HT leads separately - they are quite expensive(!), but this does suggest that they could be replaced separately from the coils.

Luckily I haven't had to mess with mine so I can't provide a definitive answer...
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Alvi
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Solved Re: Engine dying at idle (in wet?)

Post by Alvi on Tue 01 Sep 2015, 9:37 pm

Wow! You're right,that is expensive, but interesting. Thanks.
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Basil Moss
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Solved Re: Engine dying at idle (in wet?)

Post by Basil Moss on Fri 18 Sep 2015, 9:42 am

Boiling the carbs in lemon juice is supposed to be the ultimate way of cleansing all the gunge, I've heard that from various sources. It wouldn't surprise me if cola is acidic enough to do the same thing. I'd be leery of writing off tricks such as this just because ultrasonic cleaning is the modern, high tech way to do things. It wasn't available until recently, but mechanics have been dealing with filthy, gunged up carburettors since the invention of the petrol engine, I'd expect them to have figured out how to do it with what's available.
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jim157
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Solved Re: Engine dying at idle (in wet?)

Post by jim157 on Fri 18 Sep 2015, 10:05 am

Yep, citric acid is the key ingredient here.  If you end up using Cola, go for the diet stuff as it has a higher citric acid content than normal cola; plus it doesn't leave you with a sticky, sugary mess either.

Supermarket diet lemonade also works too, in fact buy the cheapest stuff you can find.

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Solved Re: Engine dying at idle (in wet?)

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