when i turn my key to the 'run' position, a humming noise comes from under the hood most of the time, well not a hum, but more like a ererererert, like a hum with a soar throat.

 

anyway, today it carried a different tune, and the wagon, which usually fires up right away, took like 5 sec to start...i thought it was my fuel pump, but i thought on an 86 turbo it was in the rear of the car...

 

any ideas? I have some worn vacuum lines if this helps...everything else works great...

thanks,

eric

a mangled fan, especially the ac one

check relays, connections, lines

it only happens for a few seconds...it is not the fan...any other possibilities?

mine does it

it used to have the air suspension junk

previous owner swapped it with regular suspension junk

 

its prolly the air compressor in the drivers side fender building up pressure

since it takes amps and volts to run a 12volt compresor that might be why it took a bit extra

due to the extra load on the battery ?

What about the cruse control bulding pressure? When ever I turn on my cruse control you can hear the pump fun for like 5 sec.

could be the cruise...I will check it out...will it do that before it starts?

 

it has never had air suspension...

 

thanks

eric

OK just check my car:

 

Pushed the cruise button and turned the key to accel = nothing

Turned the key to ON and BURRRRRRRRRRBT, the compressor ran.

 

So on my car the compressor gets power before the engine starts

 

Goood luck

Sounds like you are hearing your fuel system pressurizing. You are correct in thinking that your fuel pump is toward the back of the car, but on mine, I can still hear the system building pressure under the hood when the key is first turned on... Maybe the change in its sound also has something to do with it taking a few seconds longer to start.