Join Date: Feb 2008
Location: Arvada, CO
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Sled: 80 Jag 3000; 81 Jag 4000
ATV: 03 400 4x4 auto FIS
Yet another 03 400 no spark
I picked up an 03 400 4x4 automatic FIS a few years ago with 300 miles on it, and known problems. Would go to intermittent no spark, complete and instant shut down, and then sometimes restart right away, other times took a while. When it ran, it would cut out, backfire, etc. Research says classic flywheel magnet problem, right?
So, best intentions of getting it running right away got delayed by a few years by a blown out back, but yesterday I was able to get on the project.
Verified no spark now, pulled the cover and verified the magnets are the original, glued in, but all still solidly glued in, correct spacing, etc.
So, now what? I'm convinced that even though they look ok, replacement of the flywheel is prudent at this point, but since I'm in there - just the flywheel or go with the whole package from RMSTATOR - flywheel, stator, voltage regulator now, vs opening it up again wishing I had done the whole package?
Also, troubleshooting from here? With the case open? What's the next step in determining the actual cause of the no spark?