Fuel pump hum

[John Schwab]

When I first click the key to the on position on a 2001 ford sport trac. I can barely hear the fuel pump hum, its very quiet. I also own a 2000 Mountaineer and a 1990 ford tempo and you can't miss hearing the fuel pump pressuring hum. Just curious if they the fuel pump is quieter in the new vehicles or I'm looking at a fuel pump problem. I guessing my next step is getting a fuel pressure test done if this is not suppose to be very quiet noise. I have a rough idle problem on very cold starts below 37 degress F.

 

[Tom Schindler]

I don't even hear the fuel pump on my 2002 Trac.



How many miles are on your Trac? Have you changed the plugs and wires yet?





Tom

 

[biznaga]

It probably hums because it doesn't know the words? :wacko:

 

[Michael Cacioppo]

The fuel ump on the Trac is quiet. Check previous posts on rough idle and cleaning of the IAC or vacuum hose leak. Good luck...MikeC

 

[EddieS'04]

My '04 Trac has the quietest fuel pump of any car I ever had...I never even hear it prime up when I turn the key on to the run position...

 

[Ryan Schaecher]

I always liken it to my APU....



Ask an airline mechanic if you don't know....

 

[Dre L]

Hmm hmmm, hiiiim.

 

[Scott Tanner]

beat me to it biznaga!!! :lol:

 

[troy malone]

APU = Aux Power Unit... Supplies electrical and hydraulic power to aircraft when engine are not running...



I'm no airline mechanic... just a retired Air Force Jet Engine Mechanic...





troy

 

[John Schwab]

My trac has 87,000.



I replace the following.



Fuel Filter

Idle Air Control Valve

MAF

plug wires

spark plugs

Did a motor vac.

Coolant flush

Thermostat





My next step is probably looking at the EGR valve.