I'm at my last nerve with my 07 exl...I bought it 2 years ago and up until recently I had a vtm-4 light and cel p0420 on and off. Had the dealer I bought it from do a "cat test" said it wasnt the issue and couldnt diagnose because the light was always off by the time I drove there ?♀ The most recent problem is highway/long distances it feels like its stuck in a low gear trying to go faster feels like high rpms. When coming to a stop after driving faster than 40mph trying to go again is not an option it doesnt even rev up. Shut it off start it again and boom back to normal. Now it has no heat whatsoever but no coolant leaks or fluid loss in it. I'm ready to call it quits if it is cats and/or heater core problem...any input?? Thanks!