The curious case of a 159 2.4 (remapped) Alfa
I have a problem with my car that nobody as of yet has gotten to the bottom of, so I thought I would present thus problem to all the Sherlock Holmes' of this forum....
2007 Alfa Romeo 2.4 with.....
Car running beautifully pre disaster. Was getting 40mpg consistently and even town driving it would never really dip below 37. Plenty of power in all gears and loads of torque.
The story starts back in July.....Whilst on a road trip across Europe, the front water rack bleed valve (plastic) popped resulting in losing water immediately and cooking the engine. The car was fixed (sort of) in Poland...Just enough to get us home. They replaced the head gasket as we had totally destroyed it. Anyway, we made it home by the skin of our teeth, and I decided to get the engine stripped back home, because I was unsure of the work done in Poland (big language barrier).
The garage back home discovered that the head was too far gone and needed to be completely replaced, along with many other parts. They fitted the following
New cylinder head
all the expected gaskets etc
When I got the car back there was an immediate dip in performance and the MPG was vastly reduced. The car had no where near the torque or top end speed. It seemed to die as it went up the revs. The starting was fine.
I was advised to replace the MAF. This was done to no avail (genuine bosch model).
After it being in and out the garage to find the root of this dip in performance and mpg they still could not find the source of the problem. I lost confidence in this garage so took it down south to a 159 specialist to see if it was just simply a case that the original garage did not do a good job.
The car is with them now and they have concluded that.....
Compression test on all cylinders is good....
timing is perfect....
no faults showing up anywhere.....
workmanship on car and new cylinder head was good....
However, the specialist has readily stated that the car is nowhere near where it should be in terms of performance and mpg. I feel and he feels that it could be up to 100bhp down in power. All the usual faults and problems you get with these 159s have been eliminated, here is something more sinister at play here. The car is still there and is about to have its injectors tested. This garage has been great and has been keeping me informed. He has been in contact with other alfa specialists about my car as he has been really scratching his head over it. The other specialists has also had a similar problem with a 159 after major work and couldn't get to the bottom of it. Are there any more out there with a similar history?
I would massively appreciate your thoughts and opinions. We are both of the thinking that it seems like it is being starved of fuel. Has anyone got any bright ideas?
a stressed out alfa owner