1988 Spider Veloce Electric Fan Problem

[Timplaza]

The car has a crank driven fan and in front of the radiator an electrical fan. The electric fan used to run for a short period after the engine was turned off. I noticed it is no longer running and there is a strange beeping type noise that seems to be about mid engine. Any idea what is going on? Thanks

[seventy1]

Quote:

Originally Posted by Timplaza The electric fan used to run for a short period after the engine was turned off.

[Timplaza]

Positive. Again at the same time as I noticed the fan not running it began making a strange beeping sound that seems to come from around the injection system after I turn the engine off. Just can't figure it out. The beeping sound happens after the engine has been running and is up to temp.

[seventy1]

I believe the fan relay is mounted on the right hand fender apron where you hear the noise. Look for a small black plastic box about 1" square. Could just be a bad relay - give it a wack or find a replacement using the Bosch part number found somewhere on the part.

[Timplaza]

Thanks. I will check this.

[papajam]

Sounds like two different issues (but maybe not).

The electric fan not only runs when the A/C is on but will also come on if the air temperature sensor (top right corner of the fan shroud) reaches setpoint and turns on the cooldown relay. This can happen even when the engine is off and the key removed. Since the fan no longer runs after engine shutdown, it may be as simple as the engine bay temp is not high enough. Or it could be the sensor or the cooldown relay are bad.

The beeping (screeching?) noise may be fuel being bled back to the tank through the fuel pressure regulator (which it should NOT do). This can be checked with a fuel pressure gauge installed in the fuel rail.
OTOH, if the electric fan is not working, the fuel may be boiling after engine shutdown. The pressure increase may then be forcing fuel past the regulator resulting in the beeping.

[Timplaza]

Thanks. I checked the relay as suggested in the previous thread. It is the relay that is making the beeping sound. I will replace the relay and see if that does the trick.

[seventy1]

Quote:

Originally Posted by Timplaza I will replace the relay and see if that does the trick.

[Timplaza]

Thanks Fritz. I gave it several good wacks. It just beeped like an angry bird. I think it needs to be replaced.

[seventy1]

Quote:

Originally Posted by Timplaza Thanks Fritz. I gave it several good wacks. It just beeped like an angry bird. I think it needs to be replaced.

[Timplaza]

It did. I changed the relay today. The beeping stopped. Unfortunately the fan still did not come on. Another suggestions? I may have to replace the fan and the gizzmo on top of the radiator.

[seventy1]

Sorry to hear the relay didn't do it for you. It may have failed due to another problem. Does the fan blade spin freely? Is there a small animal stuck in it? If it's OK, does it run with the AC turned on and engine running?

[papajam]

Please keep in mind that there are two fan relays. The auxiliary fan relay powers the fan when the A/C is turned on. The cooldown relay powers the fan when underhood temps exceed x temperature. The fan power circuit through both relays comes through an in-line 20 amp fuse that is attached to the junction block (left inner fender).

[Timplaza]

WOW your right. I found the fuse. It is a 30 amp. It not only blew, it also melted the fuse holder. Wonder what caused that? My guess is someone put a 30 Amp fuse where there should have been a 20 Amp. I will replace the holder and put a 20 amp in and see what happens. Thanks for the great advise.

[Timplaza]

I replaced the fuse holder and put in a 20 Amp fuse. I am happy to say, the fan is spinning. My thanks to all of you who helped. This is my first fix at less than $20.00.