159 JTDm flat spot
We have recently acquired a 159 JTDm just approaching 3 years old with 34k miles. Within a week of taking ownership the car was towed back to the dealer unable to start.
They diagnosed and replaced the EGR valve under warranty, seems to be a common problem.
This is our first Alfa diesel, so I don't know how the engine should perform since they've fixed it. My concern is that there is a definitely drop in power around 1900 rpm.
Accelerating 40-70 in 5th gear causes the turbo to spin to maximum pressure when the engine speed is ~1500 rpm, but as the speed picks to about 1900 the turbo pressure drops off, only then to come back in on full boost at 2000 rpm.
There is a definite 2nd power surge and it's not just the dials misbehaving.
Question is, is this normal for this engine or is there something else wrong?