[drmrman]

So a couple days ago... I was sitting out front of my school just at idle in the vette... And I see that the temp gauge is starting to climb... I asked myself... WTF? So I get out of the car and pop the hood... Sure enough the fans arent blowing... Not a moment later... the friend I was waiting for comes out of the school... We hop in the vette! Take off and the temp evens out again...

Yesterday... There was a long line of traffic at a light. And Im mostly at idle again and this time *it was a little warmer out* the needle is almost PINNED to 260 deg. The second I start moving and get through the light... It evens back out to the middle marker... So I pull in my drive way... Open then hood and let it sit. I did not hear the fans come on again and at idle it pinned the needle...

Whats wrong with my car.? Is it the fans? Is it a thermostat? Is it worse?

Thanks guys!

Joe

 

[raidmagic]

Either the fans or the fan relays. You should bypass the relays and see if you can get the fans to come on. If they do you will need to replace the relays.

 

[drmrman]

A truely novice question but where can I find out how to do this? I really need to get this fixed soon because its starting to warm up...

Joe

 

[raidmagic]

Read these threads.They have crazy info in them.:thumbsup:



http://digitalcorvettes.com/forums/showthread.php?t=72010&highlight=fan+relays

http://digitalcorvettes.com/forums/showthread.php?t=62470&highlight=fan+relays

http://digitalcorvettes.com/forums/showthread.php?t=22793&highlight=fan+relays

 

[drmrman]

Awesome! You f*ckin' rock man! artyon:

 

[MEATHEAD1]

Read these threads.They have crazy info in them.:thumbsup:



http://digitalcorvettes.com/forums/showthread.php?t=72010&highlight=fan+relays

http://digitalcorvettes.com/forums/showthread.php?t=62470&highlight=fan+relays

http://digitalcorvettes.com/forums/showthread.php?t=22793&highlight=fan+relays

CAN WE SAY THANK YOU THANK YOU THANK YOU:thumbsup: :thumbsup:

 

[drmrman]

MORE QUESTIONS! **ATTENTION**

First I followed the wires from the fans to the relays which are mounted on the drivers side of the core support or radiator housing. With that... HOW!? Do I by pass the relays... Now that I have located them... What do I do from here.

NEXT! I checked the maxi block fuses and found that the "Air pump" 20A was blown... What is the purpose of the air pump and could this be the cause of my problems?

Joe

 

[raidmagic]

The air pump is for emmissions. Whether that is tied to the fans I don't know my car is older than yours.
Can you get to the plug on your fan? If so, just unplug it and run a jumper wire from your battery to the fan and see if it comes on. Make sure you have a jumper to ground as well. If there is a better way I'm sure someone with your year car will help. Mine is far easier than yours so I'm not alot of help on your year car.

 

[drmrman]

Just went out and bought a new fuse for the "Air pump"... I installed it... Turned on the car... It made this horrifying screeching/stressful kind of noise from what sounded like some sort of electric motor... Then it went went away about 5 seconds later... Just to see the fuse blew again... i think this is a completely unrelated problem... But WTF?

Joe

 

[drmrman]

The air pump is for emmissions. Whether that is tied to the fans I don't know my car is older than yours.
Can you get to the plug on your fan? If so, just unplug it and run a jumper wire from your battery to the fan and see if it comes on. Make sure you have a jumper to ground as well. If there is a better way I'm sure someone with your year car will help. Mine is far easier than yours so I'm not alot of help on your year car.

Thanks man! umm... Well I see the relay plugs but not any direct plugs to the fans... They are kind of in a difficult place/position...

I have to go to work soon so I may have to resume work on this tomorrow! But I need this fixed before the weather starts to warm up!!!

 

[drmrman]

Well... I turned the AC on and the fans came on and I turned the defrosters on and the fans came on... So the relays are good... Bad coolant sensor maybe?

Joe

 

[Toms94]

Well... I turned the AC on and the fans came on and I turned the defrosters on and the fans came on... So the relays are good... Bad coolant sensor maybe?

Joe

Joe, these cars are "bottom breathers" they act like vacuum cleaners sucking up all kinds of junk from the road. All this junk ends up between the radiator and the AC condenser. Mine experienced the same issue right after I bought it. So I removed the radiator and was shocked to see what was stuck in between. While I had it out I flushed the radiator and pressure washed the AC condenser. It's amazing how much junk was in between and the amount of sand packed in condenser. After cleaning it runs considerably cooler.

It is possible that you've picked up a shopping bag and that is what is blocking the air flow. With a little flashlight you might be able to see in between through the little gap in the passenger side of the radiator shroud.

 

[cheetah]

What year is your car? The fans ought to come on by themselves by 235 or so.

 

[drmrman]

1993... In sig.

 

[drmrman]

Joe, these cars are "bottom breathers" they act like vacuum cleaners sucking up all kinds of junk from the road. All this junk ends up between the radiator and the AC condenser. Mine experienced the same issue right after I bought it. So I removed the radiator and was shocked to see what was stuck in between. While I had it out I flushed the radiator and pressure washed the AC condenser. It's amazing how much junk was in between and the amount of sand packed in condenser. After cleaning it runs considerably cooler.

It is possible that you've picked up a shopping bag and that is what is blocking the air flow. With a little flashlight you might be able to see in between through the little gap in the passenger side of the radiator shroud.

Yeah may be? But why does that prevent the fans from coming on?

 

[raidmagic]

Yeah may be? But why does that prevent the fans from coming on?

It won't if your having a fan issue and they come on when you turn on the A/C then I look at the sending units and the relay. The dirt in the radiator area won't stop them from coming on but it is a good idea to take that apart and clean in there.

 

[Toms94]

It won't if your having a fan issue and they come on when you turn on the A/C then I look at the sending units and the relay. The dirt in the radiator area won't stop them from coming on but it is a good idea to take that apart and clean in there.

:agree: It won't have anything to do with the fans not coming on, just another thing to look for.

 

[drmrman]

It won't if your having a fan issue and they come on when you turn on the A/C then I look at the sending units and the relay. The dirt in the radiator area won't stop them from coming on but it is a good idea to take that apart and clean in there.

Ok well I just took alittle peek at the radiator... Doesnt look too bad... Few leaves and such but defiantly a good idea for a saturday project! But still dont know whats going on with these fans... Clearly the relays are fine because the fans are working properly when you turn on the A/C and defrost.

I think Im just going to bring it to a friend on this one... Ill see what I can do! He said drop it by the shop on wend.! Ill let you guys know what he says and what the fix is/was!

Joe

 

[cheetah]

The coolant sensor under the water pump is for the PCM. As temperature rises, the sensor has less resistance and the PCM calculates the temperature of the coolant. You could check the connections at the sensor or carefully jumper it and see if the fans come on.