I have an 08 Ford Escape Hybrid with 120,000 miles on it. We have had a hard and cold winter here in Cleveland and it has brought on many problems that I am not sure if they are related to the cold or to each other. A few months back, I had the common problem of the vehicle going into “electric only” mode all the sudden at 65 mph it would drop to 30 mph and a “stop safely now” message on the dashboard display. I changed the MEC pump with help from Youtube. Easy fix, $150. When that was going on, I noticed that I could postpone that event on longer trips so long as I could keep the RPMs under 2500. But I was finding that uncommonly hard to do. I thought when I fixed the MEC that would go away. It didn’t. In fact, it seemed to have gotten worse and my MPG dropped from 32 mpg down to 24 mpg. On a trip from Cleveland to Oklahoma recently, loaded for a 5 week business trip, my RPMS were swinging from 2000 to 4000 rpm with ever, even minor, incline. my MPG seems to have improved some on the trip though. Might be caused by the 40 degree increase in temperature. This is a CVT, so can’t use sluggish shifting to diagnose.
On a side not, I have an engine light on that the local parts store (who gives free computer readings) said points to an evap solenoid. This happened shortly after backing over a snowdrift that had gotten in my way over the night. Here is what makes this interesting. Internet sources point to a possibility that the EGR valve might be causing both the code being given by the check AND the loss of power. In fact this is a really strong possibility if I am reading things right. My system reports “energy: ok”.