Hi all. I have just joined this forum as I've recently become an Alfa owner. After wanting an Alfa for years, I finally gave in and bought myself a GT blackline (jtdm 150) about six months ago, however I've had a few niggles with it, the most recent being temporary/intermittent lack of power...
The other day I'd just taken the car for its MOT, and it passed with one advisory (seal around fuel filter slightly leaky). I picked the car up and drove no more than three or four miles, and it started making a VERY loud knocking noise from the engine, along with the motor control system warning light illuminating on the dash. I had it looked at by a mobile mechanic who said it was a faulty injector. I then took it to a different garage following this advice to have the injector changed, and the mechanic told me that he'd cleared error codes down, road tested it and couldn't find a problem!
Since the car was in the garage I have been driving it normally, and the loud knocking noise has not returned once. It does seem down on power at intermittent stages though. I did some digging and found the EGR valve commonly gets clogged up on these jtdm units, so I cleaned it up with the help of a thread on this forum, but it made no real difference (although a lot of soot came out of the EGR)
I am now very worried that the problem still exists and will rear its ugly head again. I have a few important long journeys to do soon, one of them being a funeral, and really don't want it breaking down on me at the worst possible moment.
Whilst cleaning the EGR I did find the pipe in the attached pictures to be loose. Is this supposed to be loosely attached to the engine or fixed properly? I could just lift it out with my hand, no effort at all. Could this have something to do with the power loss maybe?
Also, is it a good idea to add tank additives to the diesel to clean the system up or should I steer clear? I'm wondering if this will help with the power loss, but I have heard a few horror stories...
Any advice gratefully received