P38 2.5 dse miss at 2300rpm

Hello

I have recently purchased a p38 dse. So far every time I go to it there is something wrong. Generally nothing overly serious. However I have a miss at 2300rpm going through every gear. The check light flashes and loss of power until you drop below 2300 again. Has anyone else had this issue.

I have auto com diagnostics.

Three fault codes.

Glow time control - present
Engine rpm sensor - intermittent
Start of injection control timing solenoid valve - intermittent

Thanks

Check the electrical connection to number four injector.