fans -car is overheating

[mirkoelek]

my car is overheating badly. Cant find out why. My only option now is to keep fans all the time on. What is the easiest way , when i turn my ignition on that my both fans turn on too. i Can run the wire from ECU for ignition switch and i was going to run cables from batterie or something .

any ideas thank you

 

[mirkoelek]

anyone

 

[ndilo21]

Power from an accessory wire, power from a relay that connects to battery and is triggered by accessory wire, or power from battery with a switch you can turn on when you get into the car.

EDIT: Is your regular fan coming on when it should in the first place?

 

[mirkoelek]

where is the relay for fans ???

 

[mirkoelek]

never mind , fuse box , i wanted to make mine own relay

 

[ndilo21]

Yea that's what I was talking about using a relay to turn the fans on. Not a realy in the fuse box that is already there. Once again, is your fan coming on at all when it is supposed to? You may want to deal with this issue before hard-wiring your fans. It coulb be something fairly simple like a t-stat, the coolant temp sensor, or even a fuse.

 

[mirkoelek]

Yea that's what I was talking about using a relay to turn the fans on. Not a realy in the fuse box that is already there. Once again, is your fan coming on at all when it is supposed to? You may want to deal with this issue before hard-wiring your fans. It coulb be something fairly simple like a t-stat, the coolant temp sensor, or even a fuse.

tell me how to begin checking

 

[dpbgst13]

Hey i just went through the same problem. My temps were reaching 240. So my single slimline was not cutting it. Plus i had the fan pushing instead of pulling. So i installed another one. Now both of them pull and it brough down my temps to 199-220 depending if i was at a light or moving. Also i had a boost leak and when i fixed that it brought it down. But right now i just have the fans hooked up to the battery with a switch. so if you got any incite on how to wire it so when i turn on my car the fans go on that would be a big help.

Dan

 

[ndilo21]

Take your car out for a ride, drive it semi-hard (let the temp get up but not overheat), bring it home and park it. Leave it running, pop the hood and see if the fan on the left is running. Also turn your ac on and see if the right fan turns on.

 

[mirkoelek]

Hey i just went through the same problem. My temps were reaching 240. So my single slimline was not cutting it. Plus i had the fan pushing instead of pulling. So i installed another one. Now both of them pull and it brough down my temps to 199-220 depending if i was at a light or moving. Also i had a boost leak and when i fixed that it brought it down. But right now i just have the fans hooked up to the battery with a switch. so if you got any incite on how to wire it so when i turn on my car the fans go on that would be a big help.

Dan

if you do have hooked up to battery and it works fine, then other part it should be easier. just run the wire from ECU from pin for AC power and run into the relay with battery wires

 

[ndilo21]

if you do have hooked up to battery and it works fine, then other part it should be easier. just run the wire from ECU from pin for AC power and run into the relay with battery wires

WTF Sorry I just can't make sense of that?

 

[deusxmachina]

Pull the red, 10-amp fuse on the driver's side in the engine bay, and then put your a/c button to green. That will turn on both fans when they normally come on while bypassing the a/c. If you want them on at ALL times, then use one of the other methods.

Do try to figure out the real problem if it's not just heat-related. If you have a bad head gasket or something, you'll have a bigger problem on your hands if you let it go.

And bumping your own thread after only an hour is dumb.

 

[chicagoavenger]

Here this has pics

http://vfaq.com/mods/wayback/2gcoolingfan.html

 

[bfdahl]

Pull the red, 10-amp fuse on the driver's side in the engine bay, and then put your a/c button to green. That will turn on both fans when they normally come on while bypassing the a/c. If you want them on at ALL times, then use one of the other methods.

Do try to figure out the real problem if it's not just heat-related. If you have a bad head gasket or something, you'll have a bigger problem on your hands if you let it go.

And bumping your own thread after only an hour is dumb.

This is a true statment. However if both fans are not comming on when the Rad. fan comes on without the A/C the A/C fan relay is bad on the Low side of the circut. This relay is double throw design, (High and low circuits). This is the square relay to the far left of the relay block on the drivers side. left of the two round metal ones.

Mine took a dump the other day

 

[mirkoelek]

I did it!!! i ran one cable from ECU (whenever i turn my key on both my fans go on) and i hooked cables like in VFAQ for 2g and plus one more relay for the cable from ECU that when power goes to ecu the switch for fans goes on, and i get both my fans on. But i dont get full speed from mine fans... any ideas

 

[danielbui]

use a relay from a car alarm store. bosch, DEI, ect... are some brands

 

[mirkoelek]

what else could couse overheating

 

[waywest]

what else could couse overheating

Blown head gasket, bad t stat would do it too.

 

[TurkF26]

or either your radiator is clogged or rotting and your not getting good airflow through the fins. since you've heated your car up a couple times id also check the thermostat. to me it sounds like the radiator is clogged somewhat and the only way it can keep cool is run both fans.

did it overheat or get hot in town, on the freeway or both??

goodluck fixing the fan problem also.

 

[dynatos]

use a relay from a car alarm store. bosch, DEI, ect... are some brands

don't forget to put a diode between 85 and 86 with the stripe towards the positive side. It will let the power in the coil drain back through the source...

 

[kazzam]

i didn't have time to read th whole thread, but let me know if you have an upgraded fan like the spal or whatever...
The stock mitsu fans have low and high modes. They switch on low first and thats is when only engine fan works. Then temp gets higher and hi mode kicks in. This mode turns off both the fans and turns then on with more power then usual. The stock fans are pretty cool because the way the motors in them are setup, they have 2 different wirings almost like 2 motors in one... they have 4 sets of magnets to power high and low mode....
So if you switched fan, then you only get either high mode which turns on when engine is already overheated, or low mode which is not enough to cool the engine completely when driving hard or very hot day.
Hope it helps