Re: Disappointed in myself & the Alfa
Does the car have a K & N filter? These can and invariably will, given time and enough under bonnet heat, cause aggro with the MAF sensor.
If I say this once, I will probably say it a thousand times, DO NOT USE OIL IMPREGNATED AIR FILTERS! 'Why?', you may ask. Well oil is volatile and with increased under bonnet temperatures, the oil will migrate and be picked up by the MAF sensor. Furthermore once the underbonnet temperatures have increased highly a few times, the oil will start to congeal. As the oil congeals, the air flow will be restricted.
Time and time again I have seen cars, usually BDA engined rally cars with 48mm Webers or Dell'Ortos, where K & Ns have been fitted. It is easy to persuade the owner when you can demonstrate that by fitting non-oil impregnated hi-flo air filters, the power reduction from maximum potential is reduced.
Please note that I do not say that power is increased! An air filter cannot increase power output, its efficiency can only reduce power loss.
K & Ns are fine if you are doing the Paris - Dakar and can change the filters every thousand kms or are crossing the Nularbor Plain in convoy!
MAF sensors can be cleaned using one of the proprietary carb cleaners and, if the MAF sensor is dirty, think what the inside of the "throttle box" is like.
There are all sorts of little tricks you can do to the setting up of an engine that form the basis of Stage 1 tuning. By stage 1 I mean anything that does not involve altering the mechanics of the engine itself in anyway.
This is very similar to restrictions caused by dirty and/or inadequate volume flow fuel filters. Many is the demise of an expensive high-pressure fuel pump that has finally succombed to trying to push fuel through a partially blocked or inadequate volume fuel filter!
One of the best mods that can be made to all of the Alfa engines is the fitting of a variable rate fuel pressure regulator. Those that are sold on eBay for about £25-30 should be avoided like the plague, if only for the fact that the fuel pipe clips are likely to ovalise when tightened and could thus allow a fuel leak.
With power loss such as you might be experiencing, it can be best to start with the basics. In a case like this it helps to know things like mileage and service history.
Mia Bianca! I love her and not yet 30,000kms. I just can't let go
! But if someone made me an offer I couldn't refuse..................