NeilC

Your thermostat doesnt even open until the coolant gets to 190 degrees. Is 200 too high?

It is important to understand that you might have several problems simultaneously affecting the engine running in different ways. The idle being high followed by stumbling transitioning to higher rpms seems vacuum leak related but it could also...

A vacuum leak can cause high idle problems. I would check for that. Clean the ISC, it seems to help my idle stabilize. Also clean the Air flow meter but do not remove the screws! Just remove the 4 nuts and the hose clamp. While you have it...

I think a lot of the problems that all manufacturers are seeing related to timing chain/valve train/lifter problems are exacerbated by the 0w20 oil requirement. Lighter oil "can" lubricate better in some situations but there is a reason that...

I am doing this job this weekend. I have everything apart and going to clean the surfaces very good and put everything back together in the morning. The only problem I have run into is either I dropped the gaskets or the Secondary Air Valves or...