front cylinder doesn't fire

Ernest Montague afm199 at earthlink.net
Mon Aug 24 23:36:40 PDT 2009


clean the inside of the low voltage coils with brake cleaner, pinch the 
connector slightly with a pair of pliers and try. You probably have 
done this.
On Aug 24, 2009, at 10:19 PM, Randy Grein wrote:

> So have I. (grin) That's why I tested a complete coil - different 
> wire, cap, everything. Same symptoms. What worries me is that there's 
> another connector somewhere else that could be loose, but after 
> checking the schematics I think that's unlikely and the problem is 
> right there at the coil. I'll check more later, getting ready for race 
> weekend.
>
> Randy Grein, WMRRA #141
>
> On Aug 24, 2009, at 9:53 PM, Ernest Montague wrote:
>
>> I've had bad plug wires ( cut them a half inch shorter and screwed 
>> them back on the post), bad low voltage lead caps at the coil, and 
>> bad coils.
>>
>>
>> On Aug 24, 2009, at 9:48 PM, Randy Grein wrote:
>>
>>> Yup - It fails the classic external spark plug test - use a spare 
>>> plug, ground it against the engine and look for the spark. It's dark 
>>> now so I repeated and discovered one of the leads was loose. It 
>>> helped when I tightened that connector up (with pliers) but still no 
>>> spark until about 2000 rpm. At least I'm onto something; I'll have 
>>> to check a number of connections to make sure they're tight, and 
>>> maybe replace the sparkplug cap.
>>>
>>> Yes, sometimes talking about a problem leads to the solution...
>>> Randy Grein, WMRRA #141
>>>
>>> On Aug 24, 2009, at 9:32 PM, zoran wrote:
>>>
>>>> you sure it is spark missing?
>>>>
>>>>
>>>> Thanks
>>>>
>>>> Zoran Vujasinovic
>>>> Twin Works Factory
>>>> 775-786-4881
>>>> www.twfracing.com
>>>> ----- Original Message ----- From: "Randy Grein" 
>>>> <randygrein at comcast.net>
>>>> To: "SV List" <SV650 at micapeak.com>
>>>> Sent: Monday, August 24, 2009 9:29 PM
>>>> Subject: front cylinder doesn't fire
>>>>
>>>>
>>>>> Hardly the first time I've dealt with this, but before I could 
>>>>> always  count on it being the cap, wire or coil - or some weird 
>>>>> combination of  the three, and intermittent to boot. It will light 
>>>>> once the motor gets  to about 5 grand (making for a HELL of a 
>>>>> transition) but otherwise  nothing. I grabbed a spare coil and 
>>>>> plug, still nothing. Unless the  mounting bracket needs to be 
>>>>> grounded ( getting it out is a bitch with  all the cables there, I 
>>>>> just plugged the new one in to test) I'm out  of ideas. Anyone?
>>>>> Oh, this is my street ride - '02, stock stock stock, about 30k on 
>>>>> the  clock. It was riding fine, then dead.
>>>>> Randy Grein, WMRRA #141
>>>>>
>>>
>>
>



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