1973 xlh
#1
1973 xlh
I'm sure this problem has come up several times before, my 73 isn't firing on the rear cylinder. I've changed plugs 3 different times and still no change. has good compression, spark and fuel. I'm running a crane cams hi-4 electronic ignition. with everything I have checked I'm leaning towards a bad coil. any input from the ironhead gurus on what else I could check before buying a new coil?
#2
#4
#5
The only good test for a bad coil is to replace it with a known good unit. It is useful to always have a spare on hand specifically to test situations like this. So if you do buy a new coil and it does not solve the problem, it is not a waste of $s. A spare coil is like any other tool in the tool box.
For me this also applies to the generator and solenoid. Always spares in the shop.
Another possibility is a bad ignition module [Hi-4]. Do you have the instruction sheet? There is a warning on the last page to never crank the engine with no grounded spark plugs in the wires ...
http://www.cranecams.com/uploads/ins.../90004001b.pdf
Try swapping the spark plug wires, as suggested above. This is something else to have spares for.
Loose wires/connections on the coil?
For me this also applies to the generator and solenoid. Always spares in the shop.
Another possibility is a bad ignition module [Hi-4]. Do you have the instruction sheet? There is a warning on the last page to never crank the engine with no grounded spark plugs in the wires ...
http://www.cranecams.com/uploads/ins.../90004001b.pdf
Try swapping the spark plug wires, as suggested above. This is something else to have spares for.
Loose wires/connections on the coil?
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08-08-2012 07:45 PM