Hello Everybody, I hope some light can be shed for me
I have an ongoing head scratching problem with my 156 JTS. I had the cambelt changed in June. All genuine parts and fitted by Rusper Alfa Romeo. A couple of days after I picked up the car I noticed a nasty sound coming from the engine bay and had the management light come on. Took the car back to Rusper Alfa, they plugged it in, turned out something wrong with a lambda sensor. The guy reset it, checked the voltage, and its not come back since. He had a few ideas why there was a noise, possible camshaft issues was one of them.
Got home that afternoon, took off the top cover and low and behold 4 of the lobes (2 on each) were just round. 1 wasn't even pushing on its valve. Had them changed. Again I sourced the parts and Rusper Alfa fitted them for me the day before I was taking the car to Poland and Italy. The noise was still there when I picked up the car. Still I went on holiday with it as it was, did about 4500 miles and no problems. Noise didn't get worse or better.
So last week I had a brain wave after changing the oil, I disconnected the coil on number 1, revved it and noise still there. Then disconnected coil on number 2, revved it and the noise disappeared. Thought I had solved the issue. The next day I wanted to swap the coils around to see if the cause was either coil or plug. Swapped number 1 and 2 coils and made no difference, swapped number 1 and 2 plug and still the same as day before. Then I put number 4 coil on number 2 and still the same outcome. Each time number 2 is connected there is the noise, and when I disconnect there is no noise. So I thought it might be wiring issue. Had a look at it all yesterday, and although the connectors are slightly dusty and oily, there were no breaks. Cleaned everything and still have the same problem.
Then I decided to swap connectors. I connected number 2 connector to number 3 coil and vice-a-versa, and although it was extremely lumpy, i revved it and the noise disappeared.
So as you can see I am confused to the hilt.
I want to get rid of the noise as I need to sell the car, and I don't think I will with this noise. The noise is a kind of metallic tapping, but also sounds like a flapping belt. Its only there when you rev the car slowly and is between 1200 and 4000 rpm. Right at cruising speed. If you plant your foot it doesn't happen at all. I have check the belts and they don't flap about when running or revved up.
If anyone can shed any light on the problem for me I would be the happiest alfa owner in the world. Not as happy as the day I bought the car, but happy.