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Unread 12-06-2006, 02:50 PM   #1
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Join Date: Dec 2006
Location: Houston
Posts: 1
4.0 GC Quits running

My 1999 GC Laredo quits running (turns off). It was just a idle but now it happens when going 45-50 mph. The code that is set is P320. After it quits you can crank the engine and it just cranks and nother happens. Seems that turning the key off then back on then cranking will allow it to start. This restart only takes a 5 secs or so. Not sure if the key off thing is a clue or not. Code says crank sensor not seen during cranking. I have checked the cable and ground. Seem good. I am thinking about swapping the crank sensor out. Fuel pressure is good.
So can these crank sensors fail intermittent and if it did should I get some other codes? This is the only one that I get. Also I have reset the codes and when it quits the P320 reappears. Any ideas out there?

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Unread 12-06-2006, 02:54 PM   #2
Mr. Hyde!
ArloGuthroJeep's Avatar
2004 WJ 
Join Date: Mar 2005
Location: Boulder, CO
Posts: 23,084
Replace the CPS and go from there.
'04 WJ, 6" Clayton LA's, 242 SYE, 35" BFG MT KM2's, 4.56 gears, & D44a locked
'14 WK2 Limited w/5.7L, ORAI, & Tow Package
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Unread 12-06-2006, 03:02 PM   #3
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1997 ZJ 
Join Date: Sep 2006
Location: Maryland
Posts: 746
yea.. the codes that come up, come up for a reason usually, unless you completely submerge your jeep in water during a river crossing, and everything starts coming up till it all dries out
Safari'd out ZJ.
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