Lancer Fix | Rough Idle / Engine Light / O2 Sensors P0421 - Ep.1

Description

Plugs 0:19, Gasket 0:27, AFS 1:39, IAC 2:19, O2S 3:07 At 2:11 shows the engine being unstable. This is a 2003 Mitsubishi Lancer ES. I'm cleaning it up from t...

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