Molemmissa ( B280E/F ) on LH 2.2, mutta B280F:ssä on lambda. IMM on molemmissa sama, mutta ECU ja sytkäboxi ovat erilaiset.
Siinä ruuvissa on n.15 kierrosta säätövaraa. Itsellä B280E:ssä viisi kierrosta vastapäivään (laihemmalle) vaikutti CO lukemaan n. 0,15 %.
Nuo seokset voi tarkistaa myös rakennettavalla led-merkkivalolla. Ledin palamisesta näkee käykö rikkaalla vai laihalla.
Tässä kopio turbobricksiltä:
You need to either go buy the Volvo special tool part #9995280 for $35, or build it yourself using Radio Shack parts for about $5. I chose the latter. You'll need 7 10ohm resistors and an LED assembly (any color, it doesn't matter, choose what you like).
Build it as shown:
The resistors MUST be on the RED(+) lead. The light will not work if you put them on the black(-) lead.
Now you're ready to adjust your base idle.
First, you need to locate this connector, it's on your passenger side fender near the AMM:
Ground the red/white wire. The idle should drop. Go to the Idle Air Screw on the underside of the throttle body and adjust it(lengthen = faster, shorten = slower) until the idle is ~725 RPM, then disconnect the red/white wire you grounded before. The idle will surge, then settle, which is normal.
Now, hook up your test light we built above to the green/white wire. For a lean mixture, the light will be OFF. For a rich mixture, the light will be ON. The light will blink on and off at equal intervals when you're dead on. Adjust the screw on the AMM until the light blinks; counter-clockwise is rich, clockwise is lean.
Kyseisellä ohjeella olen säätänyt oman auton seokset ja tarkistanut ne laajakaistamittarilla. Tyhjäkäynti on juuri se 14.7 mitä pitääkin.