Evening all,

I would appreciate some thoughts on this.

My local garage had this vehicle driven in with a running problem which I understand to be a damaged cylinder head. It was decided to replace the engine with a second hand unit with the same engine code (RHY). This was completed and the engine turns over but refuses to start. I understand that it fires on easy start. On further investigation, it was found that the replacement engine came from a Bosch controlled ECU and subsequently the garage replaced all the engine management components from the original "Siemens" engine (incl injectors). The vehicle remains a non-start.

On my visit, I found the following:

Fault code PO341 - (Camshaft Position Sensor). This clears down but re-appears. The camshaft sensor from the original engine produces the same result.

No RPM signal on scanner.

No fuel pressure present on scanner.

The crankshaft position sensor was substituted with a known good one.

Now here comes the theories. I thought, and please tell me if I am wrong, that an RHY engine would be exactly the same whether it was under the control of either Siemens or Bosch engine management system. The other theory is that the fly-wheels are different and the flywheel from the original engine should be fitted to the donor engine.

I was asked to conduct a DTC check only on this whilst I was attending another vehicle and the garage is thinking of substituting the flywheel. I have taken sufficient interest in this to illicit thoughts from my more learned friends.

Regards

Pete M