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Misfire Cyl 4 P0304

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Original source
7 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHMisfire Cyl 4 P0304

Leading reported evidence

Recommend detergent through in case it is just debri

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

I am hoping that I can run a recommended detergent through in case it is just debri.

Original post Read captured discussion
Misfire Cyl 4 P0304
Read full discussion summary

Leading evidence: 'Recommend detergent through in case it is just debri' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Recommend detergent through in case it is just debri' (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 · 1 partial discussions

Compare 3 other evidence results

Replace lifters

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

Worst case I would lower the engine as far down as possible without pulling completely and replace the lifters on both banks.

Original post Read captured discussion
Misfire Cyl 4 P0304

Run leak down compression

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

after swapping coils and plugs, running a leak down compression test I am at a conclusion that my lifters are sticking or have some debri.

Original post Read captured discussion
Misfire Cyl 4 P0304

Test i am at a conclusion

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

after swapping coils and plugs, running a leak down compression test I am at a conclusion that my lifters are sticking or have some debri.

Original post Read captured discussion
Misfire Cyl 4 P0304
Frequently discussed actions (4)

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

Recommend detergent through in case it is just debri

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

I am hoping that I can run a recommended detergent through in case it is just debri.

Original post Read captured discussion
Misfire Cyl 4 P0304

Replace lifters

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

Worst case I would lower the engine as far down as possible without pulling completely and replace the lifters on both banks.

Original post Read captured discussion
Misfire Cyl 4 P0304

Run leak down compression

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

after swapping coils and plugs, running a leak down compression test I am at a conclusion that my lifters are sticking or have some debri.

Original post Read captured discussion
Misfire Cyl 4 P0304

Test i am at a conclusion

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

after swapping coils and plugs, running a leak down compression test I am at a conclusion that my lifters are sticking or have some debri.

Original post Read captured discussion
Misfire Cyl 4 P0304
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 · 1 excluded by outcome qualification · 0 adjusted by outcome qualification.

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

Generation: 20261026T190023Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

My 2003 C4S has a misfire on Cyl4. after swapping coils and plugs, running a leak down compression test I am at a conclusion that my lifters are sticking or have some debri. I can only deduct along with my indy shop that the lifter is the issue. The cars runs amazing but you can feel the misfire at idle. I am hoping that I can run a recommended detergent through in case it is just debri. Worst case I would lower the engine as far down as possible without pulling completely and replace the lifters on both banks. Any advice would be greatly appreciated. I have done work on my 3 chain but never on my 5 chain how much more different and difficult is it? What detergent would be recommended to try and clean any possible debri without it harming or washing more debri into the lifters Finally What part numbers are the lifters for the 3.6 5 chain motor and best place to buy them?

POST 2Original post

Can you share your leakdown and compression numbers? You say the compression is good, but here is a recent thread you might want to look at: https://rennlist.com/forums/996-foru...iston-hit.html If you haven't seen this video before, it would be good to watch it start to finish: You Tube

POST 6 / ORIGINAL POSTEROriginal post

Quotes source post: 20766383

[Image-only post; no author-written text. Original image references:] https://cimg6.ibsrv.net/gimg/rennlist.com-vbulletin/920x2000/img_0698_4baaca7711dde6aee6c55cb7ba337875c7c881f6.png

POST 7Original post

Just so you know, that is a leakdown tester, not a compression tester. You are not showing compression. And your shop should give you compression readings for all six cylinders, not one, the same with leakdown if you want to properly troubleshoot.

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