So here's my problem. I have a 97 TJ with a 4.0 and auto tranny. The engine started giving me some problems like it wasn't picking up any fuel and then just died while driving down the road. I let it sit over night and the next day it started right up and I got it back home, about 2 miles away. I got error codes 11 No ignition reference signal detected during cranking OR timing belt skipped one or more teeth; OR loss of either camshaft or crankshaft position sensor, 12 Battery or computer recently disconnected and 54  No Cam Signal at PCM. Well, the auto parts stores have no listing for a Camshaft position sensor in a 97 TJ, so I replaced the Cranshaft sensor in the tranny bell housing, and it's still doing the same thing? After replacing the sensor it sat in my drive way for 2 days. During that time, I would start it, let it warm up, get to operating temp, shut it off, restart it, took it a mile down the road and back, the check engine light no longer came on, everything seemed fine. I go to get in it today and the same stuff happens again. Any guesses?  

There should be a cam position sensor. The part number for the 01's is 4897 023AA.  Stop by a dealership and they can give you the part number.  All 2.5L 4-cylinder and 4.0L-6 cylinder engines are equipped with a camshaft driven mechanical distributor containing a shaft driven distributor rotor.
These distributors are equipped with an internal camshaft position (fuel sync)sensor. This sensor provides fuel injection synchronization and cylinder identification. If you look at your distributor it mounted to the assy.  

Even the dealer doesn't show a cam sensor for the 97  

Do me a favor remove distributor cap from distributor (two screws). Remove the rotor and look under it is there a plate looking thing with a wiring harness sticking out of it that plugs into the engine harness?  If the answer is yes look and see if you can find a part number on it because this is your camshaft position sensor.  I know for a fact the 98's have them, but not 100% sure about the 97's.  

Spoke to the guy at Napa today. He told me that the cam signal on the 97s actually come from the ignition coil. I also removed my computer and took it to have him run the diagnostic and there were 6 other codes that don't show on the key check.
p0113 Intake Air Temp sensor voltage too high
p0118 Engine coolant temp sensor voltage too high
p0443 Open or shorted condition detected in the duty cycle purge solenoid circuit
p0505 Open or shorted condition detected in one or more of the idle air control motor circuits
p0123 throttle position sensor voltage too high
p1492 Battery temp sensor voltage too high

Throw in the other three signals and can we say my computer has fried? Repair and return $288. Haven't sent it out yet, looking at other alternatives, but if I get one from the junkyard for $200 I still have to have it flashed and programed for my vehicle which runs $70.