i have a 97 grand cherokee with the 4.0 in it.. it seems to stumble or cut out while driving several times then stops and runs fine.. it does this every now and then.. i just welded a big crack on the header and now it seems to be worse.. can this be a clogged cat? or faulty ignition?
obd-codes.com says 12 is camshaft positioning sensor. Jeep calls it an ignition module, underneath the distributor cap & rotor. Mine was $55 at Jeep last year.
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