My 2003 Expedition 5.4L with 120K is running very rough between 1K - 2.5K RPM and occasionally displays charging light and stalls when stopped.
Sometimes I get 5 DTC codes: P0320, P0354, P0355, P0356, P0358

- I've purchased 3 COPs, replaced 4,5 and 6 then swapped the rest around, but the P034x numbers stay the same.

- All old COPs read good Ohm values across the two connection pins and between B+ and plug spring.

- I've replace the 14305 wiring harness (per TSB 04149) and the CKP - Crankcase Position Sensor.

- I've cleaned the MAF with MAF cleaner

- I've replace some vacume lines on the top left rear of the engine and they are all sealed now.

Any ideas?

Kevin

 

You might want to check the alternator output. It may be low and causing computer issues.