Car hums but won't start?

Asked by Nov 20, 2015 at 10:49 PM about the 2004 Pontiac Grand Am

Question type: Maintenance & Repair

My car was starting fine this
morning, then in the afternoon I went
to start it and it just made a humming
noise but didn't even turn over. The
humming sounded like it was coming
from the back of the car. It would
hum not just when I was turning the
key to start it, but as long as it was in
the "ON" position.

I'm not sure if this is related, but
about a week ago, I had the IAC
valve replaced because the car
would stall immediately after starting,
and it seemed to fix the problem.

I ended up paying $50 to tow my car
back to the mechanic that replaced
the IAC valve, and they called back
saying that they started it about 15
times with no problem.

I've done some searching, and a lot
of people suggest that it could be
the battery contacts or the
connection to the ground. Other
people say it could be a bad starter
or solenoid, whatever that is.

So I'm leaving the car with the
mechanic over the weekend, hoping
they can actually see the problem.

What could the hum be? Advice?

6 Answers

96,505

The hum is the electric fuel pump.

If the fuel pump is working, does that mean that the battery connections are fine and it's something else, like the starter? I don't remember if the lights and other electronics worked.

96,505

Clean the battery terminals, cables and all the connections. Make sure the cables clamp on tightly. Intermittent problems can be a real pain in the donkey. Good luck!

Did you ever get what was wrong with it? I am in the same boat right now.

I've since bought a new car because the transmission broke, but if I recall correctly the problem just stopped happening mysteriously. There's a chance the mechanic did something, but they said they didn't, so I don't know what it was.

If it's not too expensive, I would try changing the IAC valve since it seemed to help at least at first.

Your Answer

Grand Am

Looking for a Used Grand Am in your area?

CarGurus has 931 nationwide Grand Am listings starting at $2,295.

ZIP:

Pontiac Grand Am Experts

  • #1
    tenspeed
    Reputation
    8,000
  • #2
    John Saffrahn
    Reputation
    1,630
  • #3
    Tom Demyan
    Reputation
    1,620
View All

Related Models For Sale

Used Pontiac Grand Prix
10 Great Deals out of 2,358 listings starting at $1,900
Used Pontiac G6
29 Great Deals out of 3,647 listings starting at $1,000
Used Ford Mustang
342 Great Deals out of 41,798 listings starting at $1,488
Used Chevrolet Impala
483 Great Deals out of 31,772 listings starting at $1,000
Used Pontiac GTO
3 Great Deals out of 391 listings starting at $3,950
Used Chevrolet Malibu
983 Great Deals out of 53,481 listings starting at $1,599
Used Pontiac Bonneville
397 listings starting at $1,995
Used Toyota Camry
1,115 Great Deals out of 77,075 listings starting at $1,100
Used Honda Civic
584 Great Deals out of 52,614 listings starting at $999
Used Honda Accord
790 Great Deals out of 89,573 listings starting at $1,444

Used Cars For Sale

2002 Pontiac Grand Am For Sale
105 listings starting at $2,295

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.