SMAX Throttle Valve Issue

I have an SMAX, and that sounds familiar. Higher fuel consumption and poor starting... could the engine idle control valve be failing? Have you checked the throttle body for carbon?

Thanks, the engine idle control valve is interesting. I hadn't thought about carbon buildup first. Did your control valve issue show up the same way, or were there other signs?

It was similar. Cleaning the throttle body helped for a bit, but the problem stayed. With your mileage and symptoms, get the throttle valve checked well at a workshop. Could save money later.

Thanks for the confirmation. I had the workshop check, and they said the throttle valve was bad and needed replacing. Cost 205€. Thanks again for the help; it really guided me.