Volvo CFI system

[goflo at pacbell.net]

If the injector O-ring seals leak you get high HCs and rough idle.

Regards, Jack

Steve Jernigan wrote:
> 
> Hi Group !
>         Hope someone can help. This is not really an EFI question, the old Volvo
> 240 (1977) uses a continuous mechanical fuel injection (CFI) system, but
> this one has an O2 sensor and what the manual calls a "frequency valve"
> which apparently adjusts the mixture in response to the sensor. After
> 260,000 trouble free miles, the ol' tank no longer passes emissions for
> hydrocarbons, this accompanied by a slightly rough idle. CO is just fine,
> ~1%. Compression is OK, 120lb - 130lb ... 

<checked everything but the fuzzy dice>