Question about 2004 Pontiac Grand Am

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04 Grand AM 3.4 V6 Alternator

Car just suddenly stopped while pulling off from stoplight. Did a few jerks and had to pull over. Was told from initial diagnoses, it was the alternator. Replaced alternator and car still will not start. Everything in car turns on but it acts like it wants to turn over but it won't catch. Any suggestions as to what else could possibly be wrong? Tried to jump car as well but with no success.

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  • allmotor03gt May 11, 2010

    how many miles are on the car? and when did you get a tune up and what was replaced?



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Check fuel pump .mine did the same thing the fuel pump went out.

Posted on Apr 06, 2009


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My car driving it and all of a sudden it started jerking and then all the lights on the dash started blinking, then it went away, and then a little bit later it happened again

There are shops that can check the electrical system. It might be the alternator. You need to find a mechanic to do some measurements.

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Auto Zone does not test the alternator under full load so the test result could be borderline.
start the car and turn everything on. If the voltage drops lower than 14.2
replace the alternator.
also the battery could be being drained overnight. to check use a test light by removing a battery terminal and connecting light between battery and cable with car off.
if it lights start be removing fuses.
when the light goes off the problem is with this circuit.
lastly if the light stays on take the wires off the alternator.
if the light goes out replace alternator.

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I was driving around in my 2003 Alero V6 and all of sudden my vehicle was jerking a little and I had trouble getting the speed to climb so I pulled it into a parking lot where it just died. I tried to...

you can test the fuel pressure with a gage it should be about 35lbs pressure.have the pcm checked for codes as this can help you start in the right you have spark at the plugs if not the problem can be anything that is in the ignition system,including sensors.i have seen a catalytic converter plugged so bad that it stop a car from running and wouldn`t let it start,to test this you need to perform an exhaust back pressure idle the pressure should be less than 1lb pressure and at 2000 rpms if it was running it should be less than 2-2.5lbs pressure.i`m not neccessarily saying these are cheap test unless you can do it yourself.

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Not to disparage Advanced Auto, but you should check it yourself with a voltage meter-when the car is running, voltage should be over 14 volts, measure it at the battery posts AND at the reat post on the alternator-the readings should be within .02 volts of each other. A digital meter only costs $15 (at Advanced) and is a more accurate test than an alternator that has been removed from the car-when you test it out of the car, you are not accounting for poor connections that might be causing your problem in the first place.

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It sounds to me like you may have a blown intake gasket, which is very common on the 3800 V6 engines used in these cars, as for your power steering, the resevoir is located bellow the alternator on the back side of the engine ( it will be directly behind the pulley driven by the drive belt)

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