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fmattio
07-30-2012, 08:11 PM
I have a 96 sport 4.0 shut off sitting in traffic would not restart.no fire no fuel.changed crank sensor,no change.however when i cycle the key on there is no check eng light,so i could not get codes.gave up, went inside.came turned key on have check light starts right up drove down road and back turned off turned key back on no light no start was able to get code 12 ,53 help?????????????????????????
cantab27
07-30-2012, 08:36 PM
cps..........maybe......
cantab27
07-30-2012, 08:40 PM
heres a code chart in this link..

http://www.xjtalk.com/showthread.php?t=2438&highlight=crank+sensor
fmattio
07-30-2012, 08:45 PM
Sorry guys but read carefully done that!!
cantab27
07-30-2012, 08:47 PM
yeah my bad..................jeep owner ...sorry
fmattio
07-30-2012, 08:50 PM
We all got a case of that!
cantab27
07-30-2012, 08:52 PM
did the chart code link help
fmattio
07-30-2012, 09:01 PM
Yeah ,i know what the code means ,but ineed to know what else it might be before i buy a computer.
4.3LXJ
07-30-2012, 09:13 PM
Might be a little early to tell, but I vote ECM on this one, or possibility of a really bad ground for it
Mudderoy
07-30-2012, 09:20 PM
Might be a little early to tell, but I vote ECM on this one, or possibility of a really bad ground for it

Yeah I would check the grounds and maybe make a few more. The only other thing would be to borrow a ECM for testing, but that might be a bit hard to come by.
prcjeep
07-30-2012, 10:07 PM
Do you have any lights come on when you turn the key? maybe battery connections have corroded and need to be cleaned... or just kinda loose somewhere... i think 12 means the battery has been disconnected...
jonb8
07-31-2012, 05:05 AM
Put new terminals on, cheap and easy. I've had alot of problems with the factory terminals corroding up inside and having intermitten start/run problems. Shouldn't have shut off though, ECM problems (I've seen) usually has interior issue's at the same time. Like Tach, radio, and interior lighting going crazy. Next time you have problems unplug fuel pump at tank (right under rear seat) I've seen fuel pump problems do crazy stuff to a xj.
msmoorenburg
07-31-2012, 06:58 AM
No check engine light means no power to or dead ecu. Check the ecu fuse and make sure it doesn't have a hairline crack in it.

Good luck it took me a day to figure out it was a bad ecu on my 91