A 2000 Silverado showed a flashing check-engine light and P0300. A Bluetooth scanner narrowed the observed misfire counts to cylinders 2, 5, 6 and 8, rather than a truly uniform pattern.
What the report actually shows
Replacing one coil and the EGR valve did not change the problem. The owner also noted a prior rough idle and several maintenance replacements, but no controlled test had isolated one cause.
Reported outcome
The question did not provide a verified final repair.
What to take from this case
Save per-cylinder counts and operating conditions before replacing another part. A random-misfire code can conceal a useful pattern; avoid continued driving with an active flashing warning.
This is a reported experience and an educational reading of its evidence, not a diagnosis for another vehicle. The original discussion is linked below; AI4Car has not independently inspected the vehicle.
Sources and further reading
Community discussion · outcome not verified
For information, not a diagnosis or repair instruction. A reported result may not apply to your car. Consult the manufacturer's guidance and a qualified technician.
How to use this information
This is an editorial interpretation of a public discussion. Replies, votes and an accepted answer do not prove a diagnosis. An author-reported finding or repair has not been independently verified by AI4Car. Illustrations are conceptual. Read the content limitations.
Content and reuse
An AI-assisted educational explanation prepared for AI4Car. References provide factual context; linking to a publication does not grant a license to its text or images or imply its author’s endorsement. No Creative Commons license is asserted for those third-party materials.
Illustration: AI-generated for AI4Car; a generic conceptual view, not a photograph of the reported vehicle or a manufacturer’s diagram. Content and licensing policy.
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