High fuel temp causing fan to run?

I'm guessing your resistor is screwing it up, never heard of this before.

 

As far as I know the fuel temp has no effect on fan .
Intake air temp
Water temp
Ac head presure

But not fuel
Your problem lies somewhere else

My guess is you got some funky wiring issue on that 2ws with a 40 pin ecm

 

I don't think fuel temp has anything to do with the fan, but 160* fuel temp? that would scare me.
I just replace all my fuel lines with fittings and better 90* elbows, upgraded the fuel hoses to bigger size, installed a new fuel cooler, re route the fuel to the back of the head and return to the cooler than thru the ecm and to the tank, my fuel temp is 30* to 40* cooler than ever and since I'm a manic I can feel the way it runs
I do have the fuel temp wire but after a couple of hours you could barely notice the difference, now is like driving right after fuel up all day long.

 

with my new fuel cooler I'm about 5 to 10 degree higher than ambient temp, and I'm always under 50 gals, since been working locally, but this is Florida where humidity plays a factor and it actually helps when moving and like I've said, got a new cooler that is so efficient I was surprised, I'm even thinking of another cooler from pump to secondary filter, may not be worth it, but it's still lingering in my head.

before this cooler I was seeing around 130 somthing, around this time of the year, this might be actually your answer.

 

Not sure if this will help as I have a BXS Acert in mine,.. but I suspect it could be similar.

I had an issue with my engine fan coming on and staying on eating up my mpg. Turned out to be the high pressure AC switch.

The coupling in the connector would cause the signal to break and each time it did it would set the fan on and keep it on for long periods. Had it in a few shops and they couldnt find anything wrong.

Then through my own issues with the AC I discovered the fan kicked on when I pulled the plug for the high pressure switch. The wiring was rough and the plug had seen better days. On my Columbia they put it right on the frame by the front passenger steer,.. near the shock. I replaced the switch and rewired the connector to it. No problems since.

Hurst

 

If your engine fan is stuck on, most of the time it's the ac pressure sensor up by the radiator. At least that's what mine did. It was a quick easy fix.

 

The white smoke and rough running after extended idle is because those engines put out too much fuel to idle long periods of time. It is not a stuck injector. Putting the truck up on a higher idle speed of around 1000 rpms will help some, but of course burn more fuel while you idle. The problem is that the combustion chamber is not staying hot enough to completely burn all the fuel at idle speeds.