Question about 2003 Pontiac Grand Am

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Why wont my car start in the mornings?

My car wont start in the mornings unless I poor a little gas in the throttle body. after that it starts just fine all day. till the next morning I half to poor a little more gas in the throttle body. what could cause that

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Sounds to me that you've got the gm fuel pump (blues) problem there was a recall on this a few years back ck wth dealer to see if yours is still covered by this (save $$)

ck valve on pump sticks open over time fuel flows back to tank , a quick test of cycling key Off/on/wait 3 seconds several times before cold start will confirm this (this reprimes pump) but sadly this problem is progressive eventually pump will fail all the way resulting in no start at all

Posted on Aug 29, 2014

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Sounds like you are loosing fuel pressure overnight. Could be a fuel pump problem, or a leaking injector.

Posted on Aug 04, 2014


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Posted on Jan 02, 2017

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SOURCE: Surging

My wifes 1999 Sunfire has had problems cutting out and surging , spent 700.00 at local GM dealer still no results. I read somewhere on the web try to changing the Throttle Position Sensor. Changing the TPS has worked both times to fix the problem, for some reason the TPS failure will not send a code. We have had the car since 2000 and the chinging of the TPS has solved the problems bothy times. The TPS at NAPA in Canada is 74.00 in the US most likely cheaper, try this first based on my experience, GM will not help all they do is read codes.

Posted on Dec 16, 2008

  • 188 Answers

SOURCE: car starts hard chugs going down the road

sounds like timing and tuning. or the carb is sticking

Posted on Mar 26, 2009

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SOURCE: car won't start, little backfire through throttle body

water in the gas?
lose wire in the plugs
fuel filter is dirty
auto choke is stuck

Posted on Apr 22, 2009

  • 19 Answers

SOURCE: running rough, no power misfiring

i had that problem once. when i got under half a tank of gas in the tank. What i did was i dumped one bottle of gas line deicer in the tank and i have never had it agian. you may have some water in the tank. from condasation or i have a stong feeling i got my water from the gas station. i was using the same station all the time. so i tryed another gas station and so far no more rough idleing which was caused by the water i think and i am getting better fuel milage to. i hope this helps.

Posted on Jul 26, 2009

  • 388 Answers

SOURCE: I have a 1994 Pontiac Bonneville SSE.. won't start

It sounds like you have a short somewhere that is draining the battery...this type of thing is usually caused by a faulty voltage regulator. I recommend taking the alternator to an autoparts store to have it tested...don't be surprised if the alternator tests good; a faulty voltage regulator can and will drain a battery in a matter of hours. I am including a link where you can order a voltage regulator for your Bonneville or, while you are at the autoparts store, you can buy one there. The link will help you to see what the voltage regulator looks like so you can identify it in your engine compartment. Hope this helps, good luck!

Posted on Nov 05, 2009

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