97 jeep cherokee 4.0 liter

[alanjones62]

my cherokee has a problem where i can drive about 20 miles open road and as soon as i stop at a traffi light the engine will stall. when i try to restart the engine it acts as if the is no gas. I can use ether to start the engine and it will run again for about 20 miles. I have checked the fuel pressure at the rail and i have about 40 psi. i checked for fuel on the rail when this problem occured and had fuel pressure. I have replaced cap, rotor, plugs, and wires. The dtc i have found today are P1391, P0122, P0107, P0320, P0121. Any ideas on where to start?

 

[SteelHeadz]

P1391- Intermittent loss of cam and crank signal. P0122-TPS voltage low. P0107-Map sensor voltage too low.P0320- No crank reference signal from the PCM. P0121-TPS #1 performance. Looking at these DTC's i would start with the pcm wiring and the cam and crank sensor wirings. I would suspect that the crank sensor is intermittently loosing its signal rather than a short to ground as this will result in a NO BUS message on the cluster or the PCM. The other 2 low voltage codes could have been the result of the stalling..