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Post by darlosteve on Mar 26, 2009 19:08:13 GMT
i have a xj600s year96 the bike is only firing on cylinders 1 and 4 i have changed coil for 2 and 3 made no difference still not firing on 2 and 3. can anybody help please
cheers
steve
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Post by pilgrim on Mar 26, 2009 20:17:53 GMT
Just glanced the at wiring diagram and see that power to the coil for 2 and 3 seperates from 1 and 4 but ALL ELSE is common. That implies it's a connection between the general ignition circuit and 3/4 coil. Power from the coils are separate back to the ignitor unit.
As you've changed coil it suggests the wiring or ignitor unit.
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Post by darlosteve on Mar 26, 2009 20:24:30 GMT
thanks for your info i shall follow that up
steve
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Post by darren on Mar 27, 2009 14:11:30 GMT
Just glanced the at wiring diagram and see that power to the coil for 2 and 3 seperates from 1 and 4 but ALL ELSE is common. That implies it's a connection between the general ignition circuit and 3/4 coil. Power from the coils are separate back to the ignitor unit. As you've changed coil it suggests the wiring or ignitor unit. i would go for that, its very doubtful two plugs going dead at the same time, I do have spare coils if you want me to fetch them on sunday |
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Post by darlosteve on Mar 28, 2009 10:40:00 GMT
thanks pilgrim problem sorted part of the wiring had worn away
and was sparking off the bike frame causing the coil to cut out.
big thanks to all the club members who help novices like me
im off for a long overdue ride
cheers
steve
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Post by pilgrim on Mar 28, 2009 20:58:23 GMT
You're welcome steve. Glad a theoretical prompt comes up with the goods. It's always best to look at the simplest things first but it's not always that easy. You only have to look at life in general!  Hope you enjoyed your blast.  cheers |
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Post by amorti on Mar 29, 2009 10:27:07 GMT
For the archive, if anyone else gets the same issue - try swapping the leads over. They're about the same length and it is really easy to do it wrong.
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Post by themrs2 on Mar 29, 2009 16:11:36 GMT
Hi all
I recently got myself a '92 600 and it's got a bit of a problem with backfiring too. I took it to a place I know in town who always helped me out when I had problems with my 125 (this is my first big bike btw). One of the pilot screws had seized up on one of the carbs so I got a new second-hand set off the net and the lads rebuilt one good set from the two. My problem is (besides grammar and probably spelling) It's got a tendency to mis at around 2500rpm and also at around 70 in 5th (I don't tend to look down very long at that speed). Now I have the guys from the shop telling me it could be electrical. Any ideas guys as I've asked another mechanic to take a look and he wants £40 to ride it around for a bit BEFORE he can/will tell me anything. . .
Cheers
Mr S2
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Post by bobh on Mar 29, 2009 19:15:34 GMT
Anything below about 3000 rpm could well be carb synchronisation, especially as you've just had them rebuilt. Another possibility is an air leak somewhere in the manifold.
The higher-speed one is more tricky, though I'd think electrical only as a last resort. It would help to know whether it happens at all throttle openings or just one, and also if it occurs at the same rpm in other gears. Before spending money on a mechanic, check out the air filter and all the breather hoses as this is a common problem on the 600.
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Post by themrs2 on Apr 3, 2009 5:40:33 GMT
I took it for a spin up and down a quick stretch of dual-carriage way to see if it was the same in all gears and it's definately occuring in 4th 5th and 6th . . .
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Post by CD on Apr 6, 2009 10:55:32 GMT
If there is a break in a wire or a dodgy connection, it might only show at higher revs. The wiring is cheap to examine so I'd start there and go through everything bit by bit. It sounds bad but you are only looking at the ignition circuit. And... anything you find (and fix) along the way is one less future problem to worry about.
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Post by themrs2 on Apr 15, 2009 16:43:33 GMT
Cheers. I've just had a little problem with it mis'ing after driving about 140miles from Somerset to South Cornwall. Along the A30 between Zelah and Blackwater it started misfiring in the low revs again and when I made it to Redruth I turned it off for a few minutes and it refused to start up again lookin like a flat battery. I know an electrician down here so I'm going to beg a favour or two I think . . . . Fun n games eh ;D
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Post by CD on Apr 16, 2009 9:27:11 GMT
Best get the generator checked as well as the battery.
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Post by themrs2 on Apr 22, 2009 17:05:28 GMT
We found a wire that had previously been used when an immobiliser had been fitted to it but when the immobiliser was removed it had been poorly soldered. (it was the green and white one) so we'll just see how it goes now. . . once I've finished paying for it I can start spending money on it I suppose. Thanks all
Stu
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Post by CD on Apr 22, 2009 18:54:40 GMT
Best to go over the wiring with a fine tooth comb. Clean up any corroded connectors and look really close at any areas where the wires can rub. Your time is free and some self amalgamating tape costs very little.
Broken or nearly broken wires can be fixed with heat shrink sleeves. I've had twisted wire temporary repairs sealed under heat shrink that lasted so well I never did get around to soldering them. Sorry to say but true.
When you fit zip ties don't do them up too tight. The wires need room to flex or they can snap off where they are held tightest.
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