Nearly Burned my SHO down.

[shoon]

Blew my 50 amp rad fan fuse, so I went to the store and bought 2 more. fan kicked on and seemed to run fine. Figured I must of shorted something when I was working on it. Few days later sitting in the drive through and my car starts to overheat! Fuse blew again. Moral of the story, if a fuse blows, don't just replace it. Especially a 50 amp.

on a side note, when the SHO gets super hot and the temp gauge maxes out is it normal for the car to idle down drastically (to the point the oil light flickers?)

 

[shoon]

bump!

 

[Art5]

Don't know what to say, except for : that is good that it didn't get worse. I hope with fan replacement everything else would be the same.
I think it acted that way, because it was about to shut off.

 

[93rev2sev]

Answer, no. The extra load put on the engine from the fan must be causing the alternator to run at max output. Which could definitely slow your idle.

 

[lowc]

ill just add you are very lucky the whole thing didnt go up.. btw was this an aftermarket fan setup of the oem?

 

[Racer X]

Yes, it will stall because the high ECT sensor reading is pulling out so much fuel that the car eventually starves of fuel and stalls. If it stalls, you can expect to wait at least 10 minutes for it to be cool enough to start again.

 

[shoon]

ill just add you are very lucky the whole thing didnt go up.. btw was this an aftermarket fan setup of the oem?

It's the original 2 speed fan that came with the car; has ford stamped on it.

Just did some googling and also found out oil becomes extremely thin (as in loses density) the hotter it becomes; as a result oil pressure drops off huge. It's crazy how critical temperature is to a properly running engine! Hopefully didn't get hot enough to wreck anything. JUST replaced the WP and all of my front seals and gaskets.

 

[yamahaSHO]

Yes, it will stall because the high ECT sensor reading is pulling out so much fuel that the car eventually starves of fuel and stalls. If it stalls, you can expect to wait at least 10 minutes for it to be cool enough to start again.

Where did you see that high ECT readings reduce fuel?

 

[Racer X]

Where did you see that high ECT readings reduce fuel?

They don't? My understanding is that the ECU will enrich the mixture when the coolant temps are low to accelerate warm up to operating temperature, and will continue to trim fuel as the temperature increases past the normal operating temperature. Extremely high coolant temps and not enough fuel, and you stall at idle.

Feel free to correct me if I'm misinformed, I'd like to know if I was wrong.

 

[yamahaSHO]

There is a start up table that will richen it up based on temp, but I can't find anything that leans it out when the engine overheats. There is a table to back off timing if the car starts to overheat, but that is at WOT.

I'll look again later today, but I'm pretty sure it doesn't lean the mixture past the stabilized fuel table.

 

[firebat45]

Leaning the engine out if it's overheating is about the worst thing the ECU could do, I'd be surprised if that's what it does.