Question about 2004 Pontiac Bonneville

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How can i tell if I have a bad coil on my 2004 bonneville

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Stick a small screw driver in the spark plug boot, hold it 1/8 inch from a ground crank engine and see if there is spark, may take two people.

Posted on Nov 14, 2014

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How do I no if i have a bad coil on my 2004 Bonneville GXP 4.6 Northstar


if you have multiple coils then there will be a regular misfire on a particular cylinder. If you have sets of coils then the coil that handles a set of plugs will misfire on those plugs. If you have one coil to do the lot then indicators are engine will not start, coil lead will show a weak orange spark when sparked to metal, engine will start fine and run for a period of time before the coil overheats and starts to break down ( misfiring), coil is very hot to the touch (burning ) after minutes of operation.

Nov 13, 2014 | 2004 Pontiac Bonneville

1 Answer

2004 bonneville air only flows out of the vents, will not switch to defrost or heat. Blower and temperature are fine


Dash Switch Assembly's are 90 % the cause of this Problem since they are Made of all Plastic Parts but every once in a while You get a bad heater control Module.

Sep 25, 2014 | 2004 Pontiac Bonneville

2 Answers

Bonneville overheated now it wont even crank over


A slow cranking engine can be caused by; bad alternator brushes, bad alternator coil, faulty starter, faulty solenoid etc-----------------------------------------------------------------------------------
Renault CAN Clip

Apr 08, 2013 | 1996 Pontiac Bonneville SE CA Value

1 Answer

Code reader says it is miss firing on all cylinders and is not starting up


This could mean that you have a bad/fouled plug or plugs, bad plug wires, bad coil packs, a misbehaving fuel injector, or a scad of other things.

I'd try new plugs and wires first. It's the cheapest fix and maybe the most likely answer.

I wonder though. It seems that I've seen codes that tell you exactly which cylinders
are not firing correctly. Your code seems to indicate more than one cylinder. That still points
to the things I mentioned above, but also strengthens the coil pack theory, as they feed more than one plug.

Oct 25, 2011 | 1998 Pontiac Bonneville

2 Answers

Just had car seviced 20miles later service engine soon light came on and stayed on


Go to your local autozone or advanced...it's free to have them tell you which code it is...prob a disconnected or bad sensor

Aug 14, 2011 | 2004 Pontiac Bonneville

1 Answer

1998 Pontiac Bonneville SLE will turns over but will not run


I would check to see if the spark plugs are fouled. Or you might have a bad ignition control module (mounted under the coil packs). Auto Zone can test the ignition control module.

May 19, 2010 | 1998 Pontiac Bonneville

1 Answer

98 pontiac bonneville ssei misfiring at 30-45 mph. or when i try to get it to perform.


just fixed a car with a similar problem. check your crankshaft positioning sensor, then replace the plate that the coils sit on, it has went bad. the coils should be fine but that plate tells it when to fire.

Aug 10, 2009 | 1998 Pontiac Bonneville

1 Answer

1993 pontiac bonneville sometimes wont crank and stales out


Check the ignition module. The coils plug directly on to it, it should be silver in color and about 1/4-1/2" thick.

Mar 26, 2009 | 1993 Pontiac Bonneville

1 Answer

1994 bonneville misses especially at speed and acellerating


good chance you may have a bad coil, you can check by disconnecting the plug wires at the coil to see if your getting any spark, if your not seeing any spark when car is running your coil is bad. be sure to do disconnect the plug wire when engine is not running and key is off!
New coils run around $26.00 easy to change out, you only need a nut driver, 2 small bolts.

Dec 03, 2008 | 1994 Pontiac Bonneville

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