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does this vehicle have a distributor?
Is there some way to check the ignition coil?
I started the jeep up this morning and drove it to my place and I thought the coil either worked or didn't.
Back to my original question, why is the repair manual codes and scan tool descriptions different. P0340 is not in the manual and p1391 in the manual points to crankshaft position sensor and scan tool points to ignition system and miss fire.