SOURCE: 2002 Jeep Grand Cherokee Lardo misfiring
You say you changed the cam sensor. A1391 code is a crank sensor on the top of the trans. bell housing.
SOURCE: 2005 DIAGNOSTIC ERROR CODE P0069, CRD ENGINE WONT
Are you traveling high ground like Rocky Mountain?
I will remove the ground cable for 4 minutes to reset all data in ECU.///clock and radio stations too : (
Let the ECU to relearn the local environment parameter.
Here's so info on how to prevent vapor lock
Ride with full tank of gas but NO TOP OFF.
Crack open gas cap carefully during rest stops to release / equalize gas tank pressure'
http://www.estes-park-information.com/vapor-lock.html
Good Luck
SOURCE: Very rough idle on 2002 Jeep Grand Cherokee Limited Edition V8
If you haven't changed the plugs or had the fuel system cleaned, now would be a good time to do it. The number 1 culprit for rough idles is dirty injectors or plugs. You can try an injector cleaner in a can (or bottle) for under $10 and see if it helps, and then work from there. If there isn't any improvement then if you are able to, check the plugs for any gunky buildup and if you find a bad plug, make sure you replace them all (or have them replaced) at the same time.
SOURCE: 2005 Jeep Grand Cherokee Limited, 5.7L V8, starter
Every morning at lunch time and evening my jeep won't start. It doesn't grind but the electrical goes crazy. After a couple of trys it finally starts. Help
SOURCE: 2002 jeep grand cherokee with 4.0 engine will die but restart
p0340 is the cam shaft sensor, this will cause it to cut off while driving, hardtime starting, p0351 is the ignition coil A primary/secondary curcuit mal function. p1391 is ignition system misfire, this could be plugs, wires, or coils. first of all have the cam sensor changed and it may correct the rest of the codes. when fixed turn light off with obd2 scanner. if you do not have one, then any auto parts store will erase the codes fo free of charge.
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