Picking up on something which cropped up in a recent thread -
How many 3.7L Roadster owners are experiencing the death rattle from the engine at around 3000rpm? Has anyone had a satisfactory explanation for this other than "they all do it sir"? Is this another area where the ECU supplied as O/E is not doing what is required since there is apparently a timing change at that RPM? The engine is clearly in a distressed state when this happens.
I had this rattle on mine - and I know of at least 3 other 3.7 owners who had the same at around 3k rpm... I emailed the factory several times (no reply) and the engine importer said 'no comment'. I also took it to Revolve Engineering who prepared the ECU and had them turn off the variable valve system via software - it still made the noise - so I turned it back on. A company who prepares these engines for racing in Nobles said part of their preparation involved dispensing with the variable valve timing completely.....
I wrote to Aero Racing twice (who take the timing chain out I believe and replace it with another), but never had the courtesy of a reply.
I don't think it's ECU related - but I could be wrong. I think it's the plastic guides on the timing chain hitting the sides of the front of the engine block. Something you wouldn't hear in a Mustang due to sound deadening. Again, I could be wrong, it's really hard to diagnose, particularly with zero support or interest from the factory.
I bought a Plus 8 in the end as I couldn't live with it. I lost £25k on the Roadster which was virtually brand new.
