iamjohnny45
New User
My Massey Ferguson 165 has a bizarre problem with ignition spark. Typically the tractor will start and run perfectly when cold, but after about 2-5 minutes starts to misfire and the problem gets worse until it's backfiring and running so rough it eventually stalls.
When cold, the spark tester shows decent spark (up to 20Kv, is that normal?) but after she stalls, Spark tester shows no spark from the coil at all, even with the tester set to the minimum gap.
I've already replaced the entire ignition system; plugs, wires, rotor, distributor cap, points, condenser, and coil and yet the problem persists. I even rewired all the ignition related wiring going straight from the battery to the + side of the coil and completely disconnected all the rest of the electrical (thinking it might be some kind of short someplace). Also brand new wire from the - side to the points.
When I take off the distributor cap and hook up the spark tester I can see it's sparking at the points really badly which you can see in the below video.
https://www.youtube.com/watch?v=iNcTa_hVO3Q
Everything seems to be pointing to a bad coil or condenser but like I said they are brand new.
I'm completely out of ideas and short of replacing the entire distributor I have nothing left to replace.
Anyone have any ideas?
When cold, the spark tester shows decent spark (up to 20Kv, is that normal?) but after she stalls, Spark tester shows no spark from the coil at all, even with the tester set to the minimum gap.
I've already replaced the entire ignition system; plugs, wires, rotor, distributor cap, points, condenser, and coil and yet the problem persists. I even rewired all the ignition related wiring going straight from the battery to the + side of the coil and completely disconnected all the rest of the electrical (thinking it might be some kind of short someplace). Also brand new wire from the - side to the points.
When I take off the distributor cap and hook up the spark tester I can see it's sparking at the points really badly which you can see in the below video.
https://www.youtube.com/watch?v=iNcTa_hVO3Q
Everything seems to be pointing to a bad coil or condenser but like I said they are brand new.
I'm completely out of ideas and short of replacing the entire distributor I have nothing left to replace.
Anyone have any ideas?