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-   -   p1391 code (http://www.jeepgarage.org/f77/p1391-code-7100.html)

am2owens 03-02-2010 10:08 PM

p1391 code
 
ok, 01 wj Limited. 147000 miles 4.7 liter the #1, #3, and #8 rod bearings spun. so, i bought a new 4.7l long block and put it in. all new everything.
hit the key for the first time and it spins but will not start! that felling suck by the way! so i got inot the book and tried everything! it has correct fuel pressure, it has fire, then i gave me the p1391 code. intermentent signal from the crank or cam position sensors. i checked and re checked everything grounds, and the replaced both sensors. still nothing! the mechanics have no clue and im lost at this point. so anybody got anything for me?

jeeppro 03-02-2010 10:13 PM

Re: p1391 code
 
its the cam sensor

jeeppro 03-02-2010 10:13 PM

Re: p1391 code
 
cam or the crank for sure

Scottina06 03-03-2010 12:34 AM

Re: p1391 code
 
look at this
http://wjjeeps.com/tsb/tsb_wj_082200a.pdf

CMP SENSOR OUT OF SYNC
DAMAGED TONE WHEEL/FLEX PLATE (CRANKSHAFT)
DAMAGED TONE WHEEL/PULSE RING (CAMSHAFT)
IRREGULAR LAB SCOPE PATTERN OF CMP SIGNAL
WIRING HARNESS INTERMITTENT
INTERMITTENT CKP SIGNAL LOSS WHEN WIRING IS WIGGLED
IRREGULAR LAB SCOPE PATTERN OF CKP SIGNAL
INTERMITTENT CMP SIGNAL LOSS WHEN WIRING IS WIGGLED
SENSOR CONNECTOR/WIRING
CAMSHAFT POSITION SENSOR
CRANKSHAFT POSITION SENSOR


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