hello all

i just bought a rsx 02 type s from a friend with 85k mileage.
I did a major maintenance and they discovered there is some engine oil in the coolant. Is this normal?

Also, the engine light goes on and it says No.2 No.4 misfire. Is it because my friend did a intake modification?

 

There should not be oil in the coolant. This could be a head gasket issue. I'm not sure about the misfires.

Adding a cold air intake would not contribute to these issues.