SUDDEN drop of about 10MPG

Still here just nothing to report. THAT problem is intermittent. The fix has nothing to do with temperature. It is to turn off the car and turn the car back on. The car has failed to start the engine when leaving a traffic light three times now as well. I will start a new thread for another issue that may impact the unsuspected.

 

In the last week then ICE as failed to turn off on THREE occasions. The solution each time is to power off the car and power back own.
I have a very routine in town trip from North Phoenix to South East Mesa via Highway 101, 60, 202. In that direction I usually got near 70mpg as the trip is mostly down hill. Saturday that trip gave me 54. The return trip 49.

 

Hello Everyone, I have waited a bit to provide a little information but perhaps mostly speculation.
First the 12v battery has been replaced. There was no change with the gas mileage.

I just made another trip from Show Low, AZ to Las Vegas, NV and back. The ROUND TRIP mileage was 36.7MPG. In the past it has always been over 50MPG.

Speculation:
Most times when the ICE kicks on the instantaneous gas mileage drops below 5MPG. It USED to stay around 20MPG or so.

Unless I am going down hill, if the ICE is running the instantaneous gas mileage is RARELY over 45MPG.

Despite my issues with the ICE not turning off sometimes, I am really thinking that this is mostly an ICE performance issue. It does NOT generate any codes so the Toyota service techs say "Sorry, nothing we can do with no codes"

Has ANYONE had similar ICE issues?

Thanks!

 

Thanks! I will check that. I also found an thread on T-SB-0241-17 that identifies my issues going down the mountain that Toyota said they could not reproduce. Will try to get an appointment for this Thursday.