Car running rough, shaking and loss of power

Tiny
TERRY BOCK
  • MEMBER
  • 2003 PONTIAC BONNEVILLE
  • 3.8L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 46,000 MILES
Car running rough and shaking and no power above 30 mph max.
Wednesday, April 14th, 2021 AT 4:52 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Hi,

|Is the check engine light staying on or flashing when the engine is running? I'm asking because what you described can be the result of many things. If the light stays on, I need you to have the computer scanned for diagnostic trouble codes. They will point us in the right direction.

Here is a quick video showing how it is done:

https://youtu.be/-6SmUURn1ac

I realize most people don't own a scan tool, but oftentimes a parts store will do it free of charge or lend you a scanner.

Let me know if you notice any strange smells, smoke, sounds, or anything you can think of that may help me narrow things down.

Take care,

Joe
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Thursday, April 15th, 2021 AT 6:24 PM

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