Ok I had my PCM tuned my ION@MADZ28 . Well i chose to have the cooling fans come on at a lower temp than stock . Well this is my problem ....

The car runs cool and just fine in town driving (anything
40 mph or below) . When the car is moving 41 MPH and
up while the cooling fans are still on they (cooling
fans) become a restriction to airflow causing the
car to heat up more than usual . My Cooling fans are
staying on at 41 mph and above because the PCM sees
the coolant temp not dropping (caused by the fans
on at highway speeds) . I need the fans to turn off
while at highway speeds so the car doesnt heat up .


Am I explaing myself correctly ? cuz my point is If the
Cooling fans are on high at highway speeds they become
a restriction to airflow getting to the radiator to cool the car down .

 

You think theyre that much of a restriction? They're behind the radiator?
-b

 

Yes because the fans can pull only so many cfm's while on the high
setting . There is more cfm's of air coming into your radiator at highway
speeds than the fans can pull through . so the air doesnt get pulled through
the radiator cuz the fans are acting like a wall keeping fresh air from getting through .

 

How do you "know" they are a restriction? Maybe you have an air dam problem. That would be more common.

 

You wouldn't happen to have ground effects would you? Are you lowered? Both?

 

I don't think the fans are your prob., be sure the AC condenser and front of radiator are not dirty, a plastic ice bag got me on the interstate once, don't take much to get too hot. Danny Mc

 

The car is in perfect shape and brand new air dam . You can actually
see a temp difference when the fans arent on at highway speeds .

 

Hey do you guys think this could be contributing to my highway
cooling issues ???

 

Here is the piece thats missing from the first pics i posted . This plastic
shroud encloses the radiator from the engine bay . I removed it and didnt put it back in thats why you can see the trans cooler and radiator when the hood is popped .

 

Yes

 

Is there a gap for the trans cooler? Do you have an oil cooler up there too?

 

Yep theres a gap for the trans cooler about 1/4" actually

 

Thank you

 

See, it is not your fans at all. You removed an important piece that directs the air to the radiator. It's the same as removing the air dam.

 

It didnt dawn on me till the last minute that i left that piece out