Hi there, so I have a bit of a strange issue with my 2.7tdv6. After refitting the engine it doesn’t want to start by itself. If you remove the aux belt it starts up fine. With the aux belt fitted it comes up with a crank position sensor fault code. Am I right in assuming there is a fault with the alternator as I’ve triple checked all the wiring and I haven’t found any that I have mixed up. (Does anyone know if there are any you can mix up to cause a fault like this?) also when started the car will idle fine but as soon as you go to rev it, it will just stall straight away. And suggestions as to what this can be? Any would the two faults be related in any way? Any help is really appreciated!

Well any load on the engine causes a Problem. That’s the common Factor.

Check the map sensor is the Y

Maybe the timing belt is out of alignment. Check it

I’ve checked and even reset the timing about 3 times now using the correct locking pins. I’ve also fitted a brand new trigger wheel when the engine was out using the special tool. Would the alternator essentially over charge throwing a fault code? This is the first time I’ve ever experienced anything like this fault. When the aux belt is off it starts up completely fine. The not revving could possibly be a maf fault as the complete vehicle isn’t back together yet however I’ve tried it connected and disconnected and it’s still the same. The only thing that wasn’t connected was the air box. I’ve got a gearbox fault coming up too but the fault code is incorrect information from power train module. That may be due to the gearbox in neutral but the shifter is in park?

I doubt it’s the alternator.

Match the gearbox selector positions and that should be one less concern