[willisodhiambo]

1. Faulty DME => u should reflash it again first
3. Faulty harness => it should set fault code of miss communication
2. Worn or faulty compression ring => do a compression test or cylinder leakage test..that is the best method before take it a part

Compression test has shown all OK, DME flash will be included. Someone also suggested faulty head gasket but I would expect that to show up in compression test or coolant consumption.

If a car has blow head Gasket it will start loosing coolant...
can u Measure the Radiator pressure to verify it...

Did u do both Dry compression test & wet compression test to identify faulty Piston Ring.. The best is doing the cylinder leakage test.

Unfortunately it was others who did the test. I think Ill repeat just to be sure. I believe wet test is spurting some oil into the cylinder and cranking engine to see how it compares to dry state? If dry test show significant lower compression to wet test then we can conclude a poor oil ring?

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I know the problem. That is ecu problem. I sent pm how can you repair

Thanks. Opening the DME is a whole different proposition I guess though that it may explain the strange behaviour. Thanks. Will definitely deal with DME as last resort, opening engine seems not to make any sense as problem is most likely electrical. Thought of DME too but asked myself why one cylinder