2001 Ranger 4.0 Problems

[Zack4831]

Hi folks. This is my first post, sorta. Computer took a dump and destroyed all my passwords and user names so I rejoined.
I've got a problem with my 2001 Ford Ranger XLT 4.0 engine. Runs fine in cooler weather but on a hot day the engine starts to shut down., no acceleration. If I pull off the road, turn the engine off for a few minutes then restart it all is good; for 5 miles or so. Then it starts all over, surging and loss of power. The idle is not affected. Just when I try to accelerate.

Put a code reader on it and no codes. Thought it might be the fuel filter, changed that out, installed a new MAF sensor on and that didn't fix it.
Have any of guys ever ran across a problem like this? Again, just on hot days. If the outside temp is 60F or below, engine runs like a dream.

Is it possible this could be a fuel pump going bad? Possible that the warmer days affect the pump in some way? This problem showed up late last summer, then it cooled down. All winter truck ran fine. Now with the return of warm weather the problem's back.
Thanks in advance. Any help you can give me is much appreciated! Zack

 

[SenorNoob]

On an 01, do you have a scanner that can view live data?

If so the first thing I'd check is engine temperature when it does it. This feels like the computer thinks it's hotter than it really is...

 

[Zack4831]

Thanks SenorNoob, I'll check it out. YES, I do have a scanner that can view live data. Bought one for this project.

I've been reading about Ford's 'limp mode'. Was limp mode a thing back in 2001? When did they start doing that? Thanks for your reply. Zack