Car misfiring

[Daniel reardon]

Hi my subaru impreza gx sport.when I go to pull off it starts misfiring .soon as I go into 2nd gear it misfires and no power in it could this be the coil pack or something else

[Scoobyghost]

It could be coil pack. It could also be spark plugs. When were the plugs last changed?

[Marshffs]

Vacuum leak can cause them issues aswel

[Daniel reardon]

Thanks will try them 

[Scoobyghost]

Possible but being a gx I'd hazard a guess at it being less likely an air leak.

[Daniel reardon]

Could it be o2 sensor keeps coming up on computer

[Ric]

O2 sensor is a possibility, I've just had to replace one on my Impreza. Mine tended to misfire in a specific rev band, but could be all over. If so, it pays to shop around. Some suppliers want £200-300 for it. Got mine from Opie Oils for £107, for a denso.
If that isn't the issue, maf could be an outside possibility, or like the others said, coil packs, plugs, maybe an injector. mine benefited from a fuel system clean out with forte my mechanic put through for me.

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[Daniel reardon]

Thank will get o2 sensoe