fullymatted.
Back to search
Rennlist

OBD Error Code P0300 random cylinder misfire

Add to repair workspace
Open repair workspace
Original source
7 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHOBD Error Code P0300 random cylinder misfire

Leading reported evidence

Replace plug or coil

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

If it were specific then I could change a plug or coil.

Original post Read captured discussion
OBD Error Code P0300 random cylinder misfire
Read full discussion summary

Leading evidence: 'Replace plug or coil' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace plug or coil' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.

Read captured replies

1 matching discussions · 7 captured posts examined · 0 partial discussions

Frequently discussed actions (1)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Replace plug or coil

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

If it were specific then I could change a plug or coil.

Original post Read captured discussion
OBD Error Code P0300 random cylinder misfire
Coverage and how to read this overview

Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.

7 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

  • Rennlist: 1 discussions

0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.

0 acknowledgements have no verified action link; they do not establish a repair result.

Generation: 20261027T011819Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I haven't driven the car yet this year. Stored it all winter, and when I started it up , I got the P0300 code with check engine light. I had no check engine light when I put the car in storage last fall. Drove it a few miles with no misfires. What has me puzzled is that its not specific to any cylider, its random. If it were specific then I could change a plug or coil. Anyone else have a random misfire? Possible causes? thx

POST 3Original post

In the future when you get it right again, take it on the run and run it up to normal temps 2 or 3 times a week year round and I am sure you would prevent this from happening. You must know that a car standing idle for months is gonna kick up about being awakened.

POST 4Original post

I agree with Hurdi. Cars & airplanes & other complicated mechanical things don't respond well to just sitting around dormant for months at a time. It may just need to be exercised. If it still acts up, I'd start with looking at the coils. Lots of reports of cracked coils due to the age of these cars.

POST 5Original post

It's unlikely that a bunch of coil packs cracked during storage. They crack from heat cycles, not from just sitting around, and even a cracked coil pack can work fine until it gets wet. If it's almost empty, fill it up with fresh fuel to dilute what's already in the tank and see if it perks up.

POST 6 / ORIGINAL POSTEROriginal post

The gas is old, last October. During the winter. I start it every couple months, I don't live where its being stored. I cleared the code, will top up with fresh gas, and lets see what happens. I took it for a spin after clearing the code and its not misfiring.

POST 7Original post

Old gas, sitting still for a while...crap settles out and doesn't burn so good. Keep your OBD scanner handy - if the car is logging intermittent faults, you can see pending codes before the MIL light comes on...

This is a source reference. Confirm exact model applicability in the original material.