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Have a 2007 tahoe with a 300 code it has a misfire i would…

Customer Question
Have a 2007 tahoe...

Have a 2007 tahoe with a 300 code it has a misfire i would like to fix

Mechanic's Assistant: Have you seen the misfire code before? Has the car been stalling?

No have not seen the code before and its not stalling just runs rough

Mechanic's Assistant: Are you fixing your Tahoe yourself? What have you tried so far?

Yes fixing it myself, was thing it was coming from cylinder7, replaced coil, injector, wires and plugs runs better but still have a misfire

Submitted: 11 months ago.Category: Chevy
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Answered in 4 minutes by:
9/7/2017
Chevy Mechanic: Gary, ASE Certified Technician replied 11 months ago
Gary
Gary, ASE Certified Technician
Category: Chevy
Satisfied Customers: 1,984
Experience: Senior Technician
Verified

Hello! My name is Gary.
Welcome to JustAnswer.
I'm reviewing your question now, and will post back with a reply shortly.

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Chevy Mechanic: Gary, ASE Certified Technician replied 11 months ago

Hello there,

Does your engine have AFM, goes from V8 to V4 for highway?

If so, Cylinder 7 is an AFM cylinder, and sounds like a roller lifter has rotated in the block.

Common failure.

Gary

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Chevy Mechanic: Gary, ASE Certified Technician replied 11 months ago

Hello again,

Do you need any further help?

I hope my advice has been of assistance to you.

Kind regards

Gary

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