Lol... Heater core is leaking! ETS light is not on. Looks like I should try to completely drain fuel and refill with fresh. I'm guessing the Florida heat didn't help the fuel over the past 1.5yrs. New and old ETM were both yellow sticker.

Ok, here's the issue. My 2000 Volvo V70 is idling rough. It has high miles and sat for some time (1.5yrs). I decided to get it back on the road recently. It was sitting because the ETM was shot. I ordered a new ETM and replaced all the plugs. I also added some fuel additive to the 1/2 tank of gas. N...