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Gary, ASE Certified Technician
Category: Chevy
Satisfied Customers: 1192
Experience:  Senior Technician
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Have a 2007 tahoe with a 300 code it has a misfire i would

Customer Question

have a 2007 tahoe with a 300 code it has a misfire i would like to fix
JA: Have you seen the misfire code before? Has the car been stalling?
Customer: no have not seen the code before and its not stalling just runs rough
JA: Are you fixing your Tahoe yourself? What have you tried so far?
Customer: yes fixing it myself, was thing it was coming from cylinder7, replaced coil, injector, wires and plugs runs better but still have a misfire
JA: Anything else you want the mechanic to know before I connect you?
Customer: no
Submitted: 1 month ago.
Category: Chevy
Expert:  Gary replied 1 month ago.

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

Expert:  Gary replied 1 month 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.


Expert:  Gary replied 1 month ago.

Hello again,

Do you need any further help?

I hope my advice has been of assistance to you.

Kind regards