no spark - Star Motorcycle Forums: Star Raider, V-Max, V-Star, Road-Star Forum
 
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post #1 of 2 (permalink) Old 10-02-2016, 10:52 AM Thread Starter
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Join Date: Oct 2016
Posts: 2
no spark

I am having a little trouble with getting spark on my 2002 Vstar 650. A little background first.

1. I had a problem before that was the pickup coil. It read open but if I tapped it with a magent it would close momentarily. I had read that most had a 198ohm reading on it so I changed it.. This brought it back to life .......well for 8 months.

2. It died, same symptoms, sputter a few times, next time would not start....no spark at plugs. Replaced the pick up coil and back in business.........for 1 week.

3. Died again, no spark. Coil is reading 198 ohms, when turning over bike it goes infinite to 198 ohms which really is what it should be doing. Before I remember getting 2.4v to ground at the coil connector but now I see nothing; resistance check shows it opening and closing while turning over.

The odd thing is if I touch a meter to the pickup coil connector I get the fuel pump kicking on for a second. Then if while taping a ground to the coil connector I can get a small spark from both spark plugs. I have a known good ECM that I have swapped out and did not fix the problem. I know both coils are good (would be odd for both to go bad at the same time). The pick up coil assy. seems to be good as it goes 198 ohm to open as the starter turns over.....just no spark.

Any ideas?
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post #2 of 2 (permalink) Old 10-02-2016, 12:16 PM
KCW
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Join Date: Sep 2016
Posts: 5,229
Garage
not really sure whats going on with the bike
but will point out an Ohm meter only works on a circuit with no power.

when you crank the bike, any voltage the bike puts on the coil will scramble the ohm meter reading, so its invalid.
If you put an ohm meter across a high voltage circuit you will blow out the meter.

You can switch it to Volts to see if any energy is across the coil while cranking
and dont use the current (amps) setting with the probes across two points, you will just blow the fuse in the meter.
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