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Discussion Starter #1
So I got this '96 Jeep Cherokee XJ that cranks but doesn't start. It's got around 180k on her but I keep everything in good shape. Batt seemed strong.

I used to drive it everyday but this past year I've driven it only about twice a week. It's been just slightly slower to start in the last couple of months, but just barely slower. Was guessing it had something to do with aging plugs or something.

Drove it yesterday and everything was normal like always, sat overnight and today it cranked but didn't catch.

Any ideas on where to start?
 

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Checking the plugs and replacing if needed is a good idea , easy to get fouled up with lack of use . You could also check / clean the crank sensor , might help . This is for a 98 yr , give you an idea what is involved

 

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Thanks for the help RS. I hooked up a fuel pressure gauge and first key turn got it up to only 20psi. Second turn got it up to 45. And third and subsequent turns got it up to 48. It only fell to 43 after 2 minutes so I think that means the fuel pressure is good.

Hooked up a spark tester between a plug and wire and it didn't light at all when cranked so I'm guessing I've got a spark problem. I'll start by doing a tune up with new rotor, cap, wires and plugs then see what happens.
 

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Id have to agree with the guys on GrandMarq, its probably the crank position sensor. It should throw a code for it. I dont know if its Ford specific but when the ecu doesnt get pip signal then it shuts off the fuel and spark.


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You wont go wrong by replacing the parts you suggest but if still having problems this may help as the symptoms you are having is common on all cars when CPS is failing .

 
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