hey to you all, it`s been a while but i`m looking for a little help. We recently had to go down to 1 vehicle, (recession hit my house too) so now my poor Tib has become the family vehicle. Anyway, a lot more mileage & wear & tear later, it has now started overheating from time to time, but just over the normal temperature. It has happened before, @which time we shut down let cool for a half hour& is all good again.
ANYWAY, SAME THING HAPPENED TONIGHT, BUT I NOTICED ONLY 1 OF THE 2 RAD FANS KICKED ON.Is this normal, or should they run simultaneously, & do they have individual fuses,BTW i checked & the non running fan is not seized.
please help me save my baby
dz67

 

The pile of recent overheating threads makes it officially summer.

One fan runs when the engine gets warm
The other fan is mostly for when the a/c is on
If the car is overheating and only one fan is on, that may be a problem.

For some hints on what you might do without others offering you advice, read through the recent overheating threads and see what you can find to test.

Then your next post will be either very helpful to the troubleshooters, or "It's fix'd!"

 

I just typed this in another thread a day ago, oh well

When your gauge shows hotter than usual, it's not just a bit hotter, the gauge stays at dead center from ~180F to ~230F, then quickly rises towards the red area ~250F.. normal operating temperature is 195-205F. Driver's side fan kicks in at 205F. Pass side fan should normally only start when A/C is on.

If it only happens rarely (when really hot out) then you're "marginally" overheating, so it probably just needs a coolant flush and/or cleaning radiator fins

 

Test that both fans come on correctly, start your car and turn your ac on and both fans should be running.

 

ok, checked today, only passenger side fan runs when i turn on air conditioning, so i`m sure this is the main problem.The driver side fan is not seized, however i don`t have a tester to check for power to it.which fuse would run this, or are both fans on the same fuse?
Also going to change the thermostat to the cooler160degree , so if anyone knows a good diy post on this would be much appreciated.
thanks again all
dz67

 

Someone else jump in here but both fans should come on when you turn on the AC correct? The pass side is the AC fan for reference. Its been a while since i ran stock fans.

 

Yes, both fans come on with A/C

 

Lowering the thermostat temperature will F with your A/F ratio.

Wire the fan directly to the battery to test it

 

How do you figure?
Almost all data taken in from sensors is used in determining the correct A/F ratio. A lower temp thermostat is going to do just that...open at a lower temperature. The ecm will take the lower temperate in effect and make changes to the ratio as needed.

Your making it sounds like dropping a lower temp tsat in is going to act like those resistor box's. Theres no trickery involved here.

My advice to you deadz is to pick up a test light for $5 at your local auto parts store. Will pay for itself after one use.

edit* quoted post above mine

 

ok thx will try that,or wire the fan direct to the battery as radu suggested.should i wire it direct & leave it on full time or will this cause any problems? Btw Sea Ray, are involved with the boat mfg Sea Ray as i used to work for the resin supplier for them .....
thx again
dz67