Alfa 156 Motor Control System Failure
I have an Alfa Romeo 156 2.4 JTD Sportwagon (Year: 2002). We bought it 2 years ago second hand in a reasonable state (mechanically speaking). The performance of the car was a problem from the start, max speed is around 160 km/h, should be 212 km/h; poor acceleration. The dreaded Motor Control System Failure warning always pops up at 3000 revs or below. When we continue to accelerate, it eventually kills the power.
When we bought the car, the upper turbo hose was leaking (has been replaced since). But still no luck on the performance. The acceleration is closer to a 0.4 JTD then a 2.4.
After some research online we checked the MAF & the EGR. disconnecting both plugs, 1 at a time,... We closed the EGR, which seemed to improve the acceleration in the <2000 RPM range a tiny bit, but nowhere close to the normal performance. We also tried to clean the exhaust side of the engine (filling up the exhaust with water, 15min +2000 rev runs) still no improvement at all.
Any wisdom on this is greatly appreciated,
Thanks in advance