Question about 1998 Pontiac Sunfire

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1998 pontiac sunfire won't stay running. we have replaced the alternator and battery as well as the ground wire. the car will act like it wants to start but won't stay running.

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Check your fuel preasure see if it enough pressure to keep running

Posted on Aug 22, 2010

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Need information on 2000 Pontiac Sunfire charging system


To check the alternator on GM's. Start the car, pull the negative post off the battery. If the car dies, the alternator is bad. If it stays running. Check and/or replace the battery. Also check and clean or replace badly corroded wires from the battery.

Apr 19, 2015 | 2000 Pontiac Sunfire

3 Answers

2000 Pontiac sunfire dash lights coming on and gauges randomly go crazy


Sounds like the connection on the back side of the instrument panel may have come loose.

Nov 13, 2014 | 2000 Pontiac Sunfire

1 Answer

No power to car


check to make sure the battery cables are tight and you have a good connection. make sure the ground wire is tightly secure to a solid metal ground.
Can it be jumped off?
If so, have the alternator checked at your local part store.

Apr 06, 2014 | 2003 Pontiac Sunfire

1 Answer

New battery and new alternator on a 1998 pontiac Sunfire the battery won't stay charged


Have you checked alternator output on the car, and will the battery stay up if you disconnect the cables overnight ?

Mar 05, 2014 | 1998 Pontiac Sunfire

1 Answer

01 sunfire battery stays at 12.5v


I guess my first question is what is the alternator output at idle ?
You can't test an alternator by disconnecting the battery like we did 40 yrs ago with generators. The alternator needs the battery in circuit to perform. And now with computers, you can cook a computer by disconnecting the battery with the engine running.
You should have 3 wires coming out of the alt. The large red wire goes to the starter with a fuseable link. The other two go to the computer. They turn the regulator in the alternator on and off.
What is the voltage on that red wire with the engine running ?

Jul 29, 2012 | 2001 Pontiac Sunfire

2 Answers

We have replace the battery and alternator and the battery light is still on. What is going on???


CHECK ALTERNATOR FUSE.CHECK ALTERNATOR POSITIVE FEED WIRE SEE IF POWER GOING TO ALTERNATOR. IF NOT FUSE LINK AT STARTER BURN OUT OR THE SMALL BATTERY FEED WIRE TO ALTERNATOR BROKEN ON THE INSIDE. CHECK FOR DAMAGE VOLTAGE REGULATOR WIRES.IF ALL IS GOOD.DRIVE BELT NOT SLIPPING.BAD BATTERY CABLES WILL CAUSE POOR GROUND PROBLEMS THAT WILL EFFECT CHARGING CIRCUIT.

Jan 09, 2011 | 2002 Pontiac Sunfire

1 Answer

Have a 1999 pontiac sunfire and it has been a great little car but the last couple of days it has been acting funny. All the gauges have been going haywire, and when I shut it off and restart they are o.k....


Hi there. It sounds a little like the car was running only on the battery , as the alternator may be or has failed. Check the battery for proper voltage (12.01 and up) If the battery is good , then check all the battery connections, and grounds to the vehical chassis. If you can please get back with the results, Thank you , Quinn Texada.

Nov 07, 2009 | 1999 Pontiac Sunfire

1 Answer

Buzz in the dash, alternator not working, all light on in dash


Further test showed that the interior (dome) and exterior light flickered only while driving. The problem was that the battery rack is broken. The battery negative terminal connect to the motor (OK) but also to the frame of the car through the battery rack. Since that rack is broken, the grounding of the car was intermittent. Whenever I shifted, it made the motor move in relation to the frame of the car, so that's why is caused all the light to turn on in the dash.

Mar 22, 2009 | 1998 Pontiac Sunfire

1 Answer

98 sunfire battery light going off and on. replaced battery still going off and on, replaced alternator still going off and on but staying on longer.


Your computer board need to be reset. Take it to your local dealer it should cost anything for them to reset the board.

Mar 08, 2009 | 1998 Pontiac Sunfire

1 Answer

1996 Pontiac Sunfire Alternator


60-85 for the alt and no more than 20 too put it on and easy job

Mar 04, 2009 | 1998 Pontiac Sunfire

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