2 cylinders misfiring
#1
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I have a 2000 Pontiac Grand Am GT 2.4L with 4 cylinders. I took my car to the shop after realizing that it was not picking up speed when i got on the highway. The car would accelerate as I pressed on the gas but it would just not move. The shop said I had a misfire in cylinders 2 & 4. They recommended me to get a new coil pack, module, and spark plugs. Is this going to solve the problem because I really do not want to pay and the car is still acting up! Please help. ![Confused](https://www.gmforum.com/gm/images/smilies/confused.gif)
Also please respond immediately I am trying to get the car fixed by next friday!
![Confused](https://www.gmforum.com/gm/images/smilies/confused.gif)
Also please respond immediately I am trying to get the car fixed by next friday!
#2
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He seems to be right, but a coil pack AND module? I say replace the coil pack first. If that doesn't fix it, then go ahead and replace the module.
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2002 *-10 5.7 V8
2023 Jeep Rubicon Diesel
2011 Chevrolet Tahoe PPV
Retired Administrator
2002 *-10 5.7 V8
2023 Jeep Rubicon Diesel
2011 Chevrolet Tahoe PPV
#4
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You have two ignition coils ... one feeds cylinders 1 and 4 and the other feeds 2 and 3. With it misfiring on 2 and 4 chances are the problem is not an ignition coil (unless both are bad). When is the last time you changed plugs and wires? I would start with the basics of changing plugs and wires (if they have not been changed in a while) and see if that fixes the problem.
Here is a nice write up explaining how to test the ignition module:
http://easyautodiagnostics.com/ign_q...r_module_1.php
and the coils:
http://easyautodiagnostics.com/quad_...est_quad_1.php
Here is a nice write up explaining how to test the ignition module:
http://easyautodiagnostics.com/ign_q...r_module_1.php
and the coils:
http://easyautodiagnostics.com/quad_...est_quad_1.php
#5
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You have two ignition coils ... one feeds cylinders 1 and 4 and the other feeds 2 and 3. With it misfiring on 2 and 4 chances are the problem is not an ignition coil (unless both are bad). When is the last time you changed plugs and wires? I would start with the basics of changing plugs and wires (if they have not been changed in a while) and see if that fixes the problem.
Here is a nice write up explaining how to test the ignition module:
Part 1 -Ignition Module Test, Crank Sensor Test: GM 2.4L
and the coils:
Part 1 -Ignition Coil Test: GM 2.4L Quad 4.
Here is a nice write up explaining how to test the ignition module:
Part 1 -Ignition Module Test, Crank Sensor Test: GM 2.4L
and the coils:
Part 1 -Ignition Coil Test: GM 2.4L Quad 4.
Well I have had the car since May and I don't think that they have been changed in a while, so you don't think getting the parts they recommended will solve the problem of it not getting speed?
#6
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The parts they suggested could very well be the problem, but if my car was misfiring and the plugs and wires had not been changed in a while, I would start there. Also, if it was a 1/4 misfire, or a 2/3 misfire I would suspect a coil. A 2/4 misfire makes me think it is something else.
Did the shop check fuel pressure?
Did the shop check fuel pressure?
#7
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The parts they suggested could very well be the problem, but if my car was misfiring and the plugs and wires had not been changed in a while, I would start there. Also, if it was a 1/4 misfire, or a 2/3 misfire I would suspect a coil. A 2/4 misfire makes me think it is something else.
Did the shop check fuel pressure?
Did the shop check fuel pressure?
#8
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Dont worry about the traction code, which is likely a bad connection or sensor. I would check the plugs first, then wires, then module. The 2/4 does seem like a non-coil pack problem. Also, ask them for the codes list, and maybe someone here can given you more help.
#9
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Okay I will post it tomorrow I am going there for them to rescan and possibly give me a price on fixing
#10
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The codes they have were p0300 p1137 and p0741