Sorry for annoying once more, My Alfa 164 Super 3.0 24V has just had its Injectors professionally cleaned and its Timing Belt Replaced.
However just after taking the car back home I started to feel a certain knock or hesitation like a misfire. It got so bad that after a while I couldn't drop to 3rd Gear to go over a sleeping policeman.
I checked the engine and don't know where to start. Someone told me to clean the MAF sensor using Carb Cleaner whilst the engine is running. So I did plus I cleaned all the contacts in all connections in case of any Dry Joints.
Amazingly it worked. I took the liberty of taking out the MAF Sensor and it was filthy on the back (leading to the plenum), the Big rubber hose was full of old dried oil and grease. So I cleaned the hose with a cloth and did the same on the MAF Sensor.
I connected it back to the car and started her up, it worked. I came the next day and it started hesitating and knocking again.
I sprayed some carb cleaner in the Intake and It worked fine.
I drove it for a while and all was fine. Turned the engine off and came back after a couple of hours, the car started to hesitate again, again used the cleaner and all ok.
What is the trouble I have no Idea and its driving me nuts. I also dont have a Engine Check Light so I can't see what's wrong. Any Ideas I really need your help guys.