Suffering from a lack of power with my ?96 Peugeot SRi Turbo. Turbo96 Variable inlet 'ACAV' (long position) resonance valve
> sounds as if it?s working and does initially seem to be giving some
> boost but power then very quickly drops off. ECU light does
> occasionally come on and when plugged into diagnostic computer reports
> fault code ACAV but no one - including local Peugeot dealer - seems to
> be able to tell me what this is. Can anyone help as being left
> standing by a Ford Transit van yesterday was the last straw!
97 Variable inlet 'ACAV' (short position) resonance valve
It's some sort of solenoid, apparently.
You need to fit a boost guage. Until you can confirm your engine is making and holding boost, there isn't any point in going further.