Question about 2003 Pontiac Sunfire

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My 2003 sunfire won't start ,I heard a very weak humming sound when I turned on the key

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Posted on May 02, 2010

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1 Answer

2003 dodge caravan will not start. Makes a clicking noise, and dash shuts off, then makes a humming sound.


im going to say an almost dead battery .the hum you hear might be the fuel pump.you never heard it before because the van normaly starts .so boost your van if it starts you may have to replace the altenator the guages, no worries many cars do that .thats a code needing erased and if you disconnect the battery that may go away.

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2003 nissan xtrerra will not start. I had the battery on the charger all night. All dash lights come on when i turn the key to position one, I also hear a slight humming and somthing that sounds like a...


My 2001 Nissan pathfinder is doing the same thing....i replaced my battery and starter...It might be cables running from the battery to the starter......good luck!!!

Oct 13, 2012 | 2003 Nissan Xterra

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1978 super beetle won't crank. battery good. turn key, hear faint humming sound, nothing from engine


think you may have a faulty starter motor here ,this year vehicle will be of the pre engaged type so no seperate heavy duty solonoid unlike older cars ,i would expect a click of the solonoid and nothing if the starter has burnt out but its possible that the solonoid on top of the starter has failed but without a look myself and only a description i cannot diagnose correctly .Try some jump leads just to be sure it isnt a flat battery then check the engine earth to chassis cable then remove the starter motor and have it checked out

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My 2003 sunfire wont start. Tried charging the battery, still wont start. (It's really cold outside) It does have command start (could that be the problem?)


If it is turning over but not starting, I would put it in a warm garage and let it thaw out for awhile or out gasline antifreeze in the gas tank and let sit for couple of hours turning the key on periodically to pump gas into libes with the deicer because it sounds like a frozen gas line. Let me know if we need to go further

Jan 20, 2011 | 2003 Pontiac Sunfire

1 Answer

My sunfire cannot start,may be no fuel to the engine


Turn the key on without starting the engine. You should hear a humming sound coming from the rear. That's your fuel pump. Noise=good, quiet=bad. Assuming that's not the problem, next you may need to clean or replace the idle air control valve. It's located on the backside of the throttle body, it's round about 1 inch in diameter and roughly 1 inch long. It's probably a $75-$100 part, that's why I suggest you try to clean it first. Hope that helps . . .

Apr 19, 2010 | 2003 Pontiac Sunfire

1 Answer

2003 pontiac sunfire, key in ignition nothing. tried jumping, nothing. Left for help, came back car started right up 4 or 5 times, Now nothing. Why? ty, Sue


Sounds like a short in the ignition switch. Next time it does it, try shaking and turning the steering wheel while you're turning the key to start. If this doesn't work, try cycling the switch on and off several times. Chances are, this is your problem.

Jun 07, 2009 | 2003 Pontiac Sunfire

1 Answer

My 2004 530i won't start.


If you hear a mechanical hum then its either something with the starter or the battery. Charge your battery and see if its just a little too weak to turn the engine over. If that doesnt fix it, then you might have to replace the starter. Unless there is a serious mechanical issue, your engine shouldnt be the reason the starter can't get it to turn over.

Oct 19, 2008 | 2004 BMW 5 Series

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