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O/T 92 Jeep Cherokee with no spark

O

old

Well-known Member
Location
Camdenton Missouri
Looked at this for a guy and it seems to have no spark. I tried a hot wire from both sides of the ballast resister so as to go around most of the system and still no spark. Cap and rotor look pretty ruff so thinking about try that but hate to just throw parts at it. The guy told me he has had it at two shops with out a fix. Tow it in and it runs for the shop but drive it home and it may or may not run. It is a tad to new for me to know much about how to fix it. Also thinking maybe a coil going bad. So any body have any good guesses as to what maybe wrong with it. The guy is just about to the point of giving it to me just because it is making him spend money for towing it
 

I had a 92 w/ the 4.0 given to me a few years ago because the guy didn't want to ship it home. Would do the same thing. Shops didn't know how to work on it (computer software for diagnostic machine) and I didn't want to pay by the hour for them to scratch their head.
Roadside service mechanics here are usually better than shop mechanics, so I waited til it quit, called the roadside service, the guy checked everything and said it was either the pickup in the distributor. Ordered a complete distributer and ignition coil from rock auto for 75 bucks (after core refund) and fixed the problem. Don't know which it was but the 75 bucks was cheaper than an hour labor and the diagnostics was free.

Dave
 
Old,going off the info you gave,it really sounds like a crank sensor.Especially the "starts one time,not the other" thing going on.Ive replaced quite a few in the 4.0"s

The sensor is on top of the trans bell housing,toward driver"s side a tad.Reads off the starter ring gear.

As far as the sensor,I seriously wouldn"t waste my time with aftermarket junk.Get the OE from a Chrysler dealer.BTDT
 
Old, if it's got an engine control module (ECM), the ECM going bad can emulate problems anywhere else in the electrical system. Cost me a chunk of change to find that out since the problem was intermittent.

So - if you can get it running, tap on the ECM and see if the engine dies. IF it dies, you know where the problem lies.
 
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