99 WJ with 4.0 - 199,000. Ok everyone, here's the deal. I have replaced both the cam and the crank sensors. Took out for a test ride and stalled on mild acceleration as it had prior to changing sensors. Stopped to read codes and none showed up. So... I hooked up so my passenger could read the codes as it happened and check fuel delivery. Hit the gas and stalled, BUT it cleared the handheld as if we lost power as well. Tried again and got new codes P0340 and P1391. Once we got them I tried three more times to see what would happen. 2 of the 3 it cleared the handheld again. This is consistant with P1391, but what;'s the deal with P0340 and how do I check the camshaft target wheel runout??? Need help, brain hurts.

 

This says it's on the right side camshaft sprocket. http://www.wjjeeps.com/faultcodes.htm#0300
Sorry I can't help you on this.
And Welcome to CF!

 

Thanks for the welcome. I'll take a look at the link.