Power reduction on extended high speed driving?

[GPSMan]

You confirmed your truck is normal.

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[DreamWeaver21]

I just drove a 1000 miles mostly on the interstate at 70 plus in west Virginia on grades of 7 to 8% for continuous periods of up to 7hrs on our return with no issues on power and or temps. I noticed no power reductions at all

I haven't noticed issues at 70 or 75mph either. Really only seems to be an issue during periods of driving at 90 or 90+ mph which isn't common or legal in the states. I am sure someone has done it though. I never saw the temp gauge move when I had the issue. The truck just didn't want to give all it has anymore.

 

[notfast]

I'm pretty sure you overheated the generator, which is not tied to the gauge on the dash, you need a scanner plugged into the data port to read generator temperature.

You CAN NOT sustain over 50% power output in a Maverick for more than 10-15 minutes. The generator heats up.

That's also why driving Priuses from Los Angeles to Las Vegas sucks. They make great city cars, but sustaining freeway speeds over mountain passes with the A/C on and carrying a bunch of people/stuff is a no-go.

 

[GPSMan]

I haven't noticed issues at 70 or 75mph either. Really only seems to be an issue during periods of driving at 90 or 90+ mph which isn't common or legal in the states. I am sure someone has done it though. I never saw the temp gauge move when I had the issue. The truck just didn't want to give all it has anymore.

The temperature gauge stays "normal" from 180 to like 250 degrees. Then jumps to "hot" all at once when a trouble code comes up; just FYI.

Don't quote me on the 250 value but it's close.

 

[AutobahnSHO]

I haven't noticed issues at 70 or 75mph either. Really only seems to be an issue during periods of driving at 90 or 90+ mph which isn't common or legal in the states. I am sure someone has done it though. I never saw the temp gauge move when I had the issue. The truck just didn't want to give all it has anymore.

It's really wild how the HP required to fight wind goes up exponentially. I got much much worse MPG at 90mph than 75mph in my SHO there.

And even the Civic I traded in for my Mav this year got ~42mpg at 65mph and only about 38mpg at 75mph....

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