04 mastiff no spark
- Thread starter Badazz
- Start date
Battery reads 14.6
The battery is at 12.9 and when I press the run button I get 9.6 to the coil. When I checked earlier I forgot to unhook the float charger.
Have your battery load tested. Sounds like it’s shot.
Mikeinjersey
Well-Known Member
I see you have posted on this problem before. What troubleshooting steps have you actually taken??
SCC007
Active Member
Check the battery, regardless of age some can have bad cells. I have had several brand new (as in at the store) that failed load test. Deka have been the best for me and all my bikes now have one in them.
Start with checking the battery then start working your way toward the coil. Also make sure to check your grounds.
Start with checking the battery then start working your way toward the coil. Also make sure to check your grounds.
Mikeinjersey
Well-Known Member
Does the led on the ignition blink while cranking the engine? Yes/No
It stays solid
Jersey Big Mike
100K mile club
bad cam sensor most likely. Cam sensor is electronic replacement of distributor/points -- tells ignition when to fire.
Mikeinjersey
Well-Known Member
I agree with JBM . The cam sensor is the most likely suspect. I'm not sure if the sensor can be tested without a special ignition tester from Big Dog but someone on this site may have that info. You can visually check for melted wires but you may end up just replacing it without knowing for sure that it is the problem. Good news not expensive!
Be certain to mark and replace it in the same position of the removed sensor.
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Ok I will give that a try then. where is that located and how hard to replace
Mikeinjersey
Well-Known Member
No it's not difficult. This is a link I found on our Technical How To forum
Again!!! Be certain to mark and replace it in the same position as the removed sensor. Also disconnect your battery before doing this job and put the bike in neutral so it can't crank the engine by mistake if for some reason the bike moves.
Cam Sensor Change: 2004 Bulldog
First off, this is not applicable to later models as they have a more traditional sensor. The 04's used the old cam sensor under the point cover approach. Why would you need to do this? Well, pretty much next to NEVER unless you're chasing a freak ignition problem like I was. I narrowed it...
www.bigdogbiker.com
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Thank you I will give that a try.
Mr. Wright
Knows some things
I'm sure that's what it is. I carry an extra one with me. Like the old Harleys, you had to carry an extra set of points around with you. HDM does carry a solid state unit that fits in the nose cone, but the cam sensor will fix your problem.
I ha e the old one out now is there a way to test it
Mr. Wright
Knows some things
There is, and the procedure is in the manual. But it's only about 75% accurate. I've had many that have tested good that were clearly bad. I am a repair shop, so I see a few of them come through here.
