SuperCoupe
Registered User
Last week my SC started sputtering whenever it went into boost. This morning it's running even worse. Almost puttering....kind of like it's running on 3 cylanders. I checked the air filter, and it seems ok (It's a MAC system). I was thinking that maybe the high flow cats might be clogged, maybe a bad TPS?? Anyone have any ideas? It's a 90 5 speed with a high flow exhaust. I'm not getting a check engine light, and unfortunately I don't have a code reader.