After cleaning the idle control valve (to fix fluctuating idle revs) the situation improved a lot, but one little glitch remained. If i let the car idle, push the accelerator just a little (1500 revs) the revs fluctuate when returning to idle. This does not happen if i rev it up to 3000+. Also i have noticed it is actually worse, when the engine is warm. Otherwise the engine runs very good. The local Alfa specialist connected it to a tester and it reported no error codes. My power steering system is whining a little, but the specialist said it is not worth to repair it, because it works fine. Could it be that the pump is taking too much power to run and the engine is compensating?
I cleaned the idle control valve not the MAF. Did it with carb cleaner, soft brush and WD40 afterwards.
The specialist garage fiddled with the air flow meter and they said it is ok. They even tried to change it, but it did not help. But that was before me cleaning the idle control valve. I don't know which MAF i have, my Alfa is a late 96 1.8 TS 16v (with bosch black thingy for the meter) if this tells you more.
But if i understand the things correctly the air flow meter should affect running speed also. My glitch appears only at idle no jerking, jumping or bouncing when i drive.
Otherwise tried to disconnect the ecu lead to the idle control valve, the beast idles at 1500 if i do that and the revs do not fluctuate.
I know it is a small and stupid glitch, but that angers me even more, because probably it takes only a little to fix it.
I think this is a condition that affects all the 16vs. It is something to do with the variator changing the cam profile, I do not think it is a problem but can make slow driving a problem. One of the chips squadra I think claims to solve this, read the info on the shop site re the chips
No air leaks but i will have a look at the idle speed control vavle tomorrow and the variator is on its way out because when you rev it above 2000rpm + the variator clatters like hell but silent on tick over so could this mean that i shouldd change the variator or do you think it is likely to be something else ?????