Hi, I have a '99 V70 with 150K miles. Car recently developed a lumpy idle. CEL went on. Checked the codes with Actron scanner and got P1081, 1021, 1026 and 1031. All read Manf cntrl fuel&air metering, auxiliary emission controls. Couldn't find these online and my Chilton manual (up to '98) doesn't have these codes. The MAF sensor was replaced 3 weeks ago as were plugs. Cleaned the throttle body - small tarry build up. Also one of the vacuum lines from cleaner box was disconected at air inlet duct valve - replaced line. Cleared codes and restarted. Idle still lumpy and got same codes. Anyone have any ideas? Engine seems to run OK when gassed, it's just on the idle.