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2003 Pontiac Grand Am Rough idle/Rough acceleration

Tiny
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  • MEMBER
  • 2003 PONTIAC GRAND AM
Electrical problem
2003 Pontiac Grand Am 6 cyl Front Wheel Drive Automatic 126*** miles

Symptoms: Car shaking, rough idle, hesitates when accelerating.

Codes: 302 (Missfire in cylinder 2)

Current is going over the wires. I pulled the spark plug in cylinder 2 and it didn't look like it had been firing (it was black not white like the other spark plugs). Changed cyl. 2 spark plug. Doesn't really have the hesitation as much anymore, but now has a rough idle. Does this just mean that the coil for cyl. 2 is bad?
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Monday, January 12th, 2009 AT 8:16 PM

2 Replies

Tiny
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  • 18,828 POSTS
Most likely the wire if they are OEM then way over due for replacement.
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Tuesday, January 13th, 2009 AT 8:19 AM
Tiny
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Did you read the part where I said "Current is going over the wires" meaning the wires are fine.
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Tuesday, January 13th, 2009 AT 3:04 PM

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