Wavering temp gauge - 159 JTD
I have noticed a small issue with my 159 2.4 JTD that I am interested to know if anyone else has seen.
When on cruise control on the highway I occasionally notice a very slight variation in power, not enough to change the speed from the set point but noticeable for the driver. At the same time the temperature gauge dips slightly from its usual 90 to about 87 and then comes back to 90. This doesn't happen all the time but only occasionally. I know that I will never be able to demonstrate it to a mechanic so I haven't bothered to report it and added to that my local Alfa dealer has just lost the franchise and the nearest dealer is 3 hours away in Melbourne!