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Posted by MikeC [63.252.185.155] on Monday, June 21, 2010 at 17:23:37 :
In Reply to: OT-flathead woes Ford 8N posted by J. Veitti [69.144.190.102] on Wednesday, June 16, 2010 at 22:19:53 :
Front or side mount distributor?
The front mount distributor has a bushing that wears out, but it's simple to replace. It's a frequent cause of a persistent miss.
Leaking manifold gasket can be diagnosed by spraying a little starting fluid (engine running but cold) around the rear of the manifold. If the engine speeds up you have a leak.
Double check, and then double check again your firing order. N's will run with 2 plug wires out of order, but will be weak under load (and miss).
Last but not least, there were a batch of camshaft gears that had the alignment mark in the wrong location. The engine would start and run, but was weak and missed.