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

46,075

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.

46,075

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

Add photo

Related Questions

  • Car won't start 1 answer

    My 2000 Pontiac Grand Am won't start won't even try to start the security light does not Flash and I tried letting it sit for 10 minutes on acc then turning it off for 10 seconds and repeating it t...

    2000 Pontiac Grand Am SE

    -

    Maintenance & Repair

  • Changed plugs and car won't start now 1 answer

    I changed my plugs out and now my car won't start it just cranks. It started before I replaced plugs....... Any idea????

    2001 Pontiac Grand Am GT

    -

    Maintenance & Repair

  • Car won't start after over heating 1 answer

    My car started over heating. After a little better look I replaced the water pump and the thermostat. The car still over heats and for some reason won't start after over heating until it cools.

    2005 Pontiac Grand Am SE

    -

    Maintenance & Repair

  • Car won't start

    Automatic day lights don't work auto trunk button don't work radio won't work car won't start till it's towed it's a 2001 grandam

    2001 Pontiac Grand Am SE

    -

    Maintenance & Repair

  • Car won't start 1 answer

    Car wont start dont know whats wrong with it changed the coil still nothing it ignites but won't turn over. If anyone has un idea of what it might be please let me know

    1997 Pontiac Grand Am 2 Dr SE Coupe

    -

    Car Customization

Grand Am

Looking for a Used Grand Am in your area?

CarGurus has 23 nationwide Grand Am listings and the tools to find you a great deal.

Postal Code:

Search Pontiac Grand Am Questions

Pontiac Grand Am Experts

#1 tenspeed
tenspeed
Reputation 7,430
#2 John Saffrahn
John Saffrahn
Reputation 1,550
#3 Tom Demyan
Tom Demyan
Reputation 1,360
View All

Related Models For Sale

Used Pontiac Grand Prix
41 listings starting at $1,850
Used Pontiac G6
132 listings starting at $2,485
Used Chevrolet Impala
42 Great Deals out of 912 listings starting at $1,500
Used Ford Mustang
6 Great Deals out of 815 listings starting at $6,495
Used Chevrolet Malibu
97 Great Deals out of 2,060 listings starting at $2,500
Used Nissan Altima
59 Great Deals out of 1,299 listings starting at $1,999
Used Pontiac Bonneville
2 listings starting at $6,995
Used Pontiac GTO
3 listings starting at $12,500
Used Toyota Camry
41 Great Deals out of 1,460 listings starting at $1,699
Used Honda Accord
80 Great Deals out of 1,021 listings starting at $1,888