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Rough idle

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Original source
6 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHRough idle

Reported or suspected cause

maf sensor in my case

Suggestion or failed attempt

No successful repair reported for this finding.

0
Identified cause
1
Suspected cause
0
Reported fixes
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 suspect a cause
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.

Suspected cause

I also took the chance to clean the throttle body but it was moving quite freely so I think the root cause was the MAF sensor in my case.

Original post Read captured discussion
Rough idle
Frequently discussed work

Clean of the maf sensor

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

I had a rough idle and a simple clean of the MAF sensor with a specialised spray resolved my problem.

Original post Read captured discussion
Rough idle
Read full discussion summary

Leading evidence: 'maf sensor in my case' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'maf sensor in my case' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Clean of the maf sensor' (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 · 6 captured posts examined · 0 partial discussions

Compare 4 other evidence results

temperature related, appreciate the info

Suggestion or failed attempt

No successful repair reported for this finding.

0
Identified cause
1
Suspected cause
0
Reported fixes
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 suspect a cause
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.

Suspected cause · Original poster

Thanks for sharing, I am in South Dakota, it was 55 degrees yesterday, so I don't think my issue is temperature related, appreciate the info.

Original post Read captured discussion
Rough idle

Clean of the maf sensor

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

I had a rough idle and a simple clean of the MAF sensor with a specialised spray resolved my problem.

Original post Read captured discussion
Rough idle

Clean throttle body

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

I also took the chance to clean the throttle body but it was moving quite freely so I think the root cause was the MAF sensor in my case.

Original post Read captured discussion
Rough idle

Run few minutes it runs great

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

2004 C4S 108,000 miles, experiencing rough idle when cold, the car starts right up but sometimes will kill and if I try to give it any gas it will die, sometimes I can feather the gas and get some rpm�s and it will clear right up, once it is running for a few minutes it runs great, it only does it after it sits overnight, once it is going there are no issues at all.

Original post Read captured discussion
Rough idle
Frequently discussed actions (3)

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

Clean of the maf sensor

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

I had a rough idle and a simple clean of the MAF sensor with a specialised spray resolved my problem.

Original post Read captured discussion
Rough idle

Clean throttle body

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

I also took the chance to clean the throttle body but it was moving quite freely so I think the root cause was the MAF sensor in my case.

Original post Read captured discussion
Rough idle

Run few minutes it runs great

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

2004 C4S 108,000 miles, experiencing rough idle when cold, the car starts right up but sometimes will kill and if I try to give it any gas it will die, sometimes I can feather the gas and get some rpm�s and it will clear right up, once it is running for a few minutes it runs great, it only does it after it sits overnight, once it is going there are no issues at all.

Original post Read captured discussion
Rough idle
Reported and suspected causes (2)

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

maf sensor in my case

No successful repair reported for this finding.

0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context
Discussions that suspect a cause
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.

Suspected cause

I also took the chance to clean the throttle body but it was moving quite freely so I think the root cause was the MAF sensor in my case.

Original post Read captured discussion
Rough idle

temperature related, appreciate the info

No successful repair reported for this finding.

0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context
Discussions that suspect a cause
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.

Suspected cause · Original poster

Thanks for sharing, I am in South Dakota, it was 55 degrees yesterday, so I don't think my issue is temperature related, appreciate the info.

Original post Read captured discussion
Rough idle
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.

6 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.

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

Outcome without a verified action link

I had a rough idle and a simple clean of the MAF sensor with a specialised spray resolved my problem.

Original post Read captured discussion

No unique explicit quoted action; no causal link assigned

Generation: 20261026T212127Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

2004 C4S 108,000 miles, experiencing rough idle when cold, the car starts right up but sometimes will kill and if I try to give it any gas it will die, sometimes I can feather the gas and get some rpm�s and it will clear right up, once it is running for a few minutes it runs great, it only does it after it sits overnight, once it is going there are no issues at all. Please let me know if anyone has any ideas of where I should start. Thanks. Jay

POST 2Original post

I experience the same thing with my '02 C2 when the ambient temperature is around 100' Fahrenheit or higher (in other words every summer here in Phoenix). Here's a thread where Skip et. al. discuss possible causes: https://rennlist.com/forums/996-foru...rt-issues.html For me at least the issue goes away whenever my garage temperatures go down to slightly more liveable levels.

POST 3 / ORIGINAL POSTEROriginal post

Thanks for sharing, I am in South Dakota, it was 55 degrees yesterday, so I don't think my issue is temperature related, appreciate the info. Jay

POST 4Original post

If it was 55' Celsius it would! You'd have to live in Death Valley to pull that off though. On a more serious note, the thread I linked discusses a lot of possible mechanical causes as well and includes input from some of the major tech heavyweights on the board - it's well worth the read.

POST 5Original post

I had a rough idle and a simple clean of the MAF sensor with a specialised spray resolved my problem. I also took the chance to clean the throttle body but it was moving quite freely so I think the root cause was the MAF sensor in my case.

POST 6Original post

I was going to suggest the MAF but I see you got it. You can always check it by removing it and if it suddenly idles and runs better you know thats the issue. I replaced mine with a Bremi MAF and it worked perfect afterwards. Price was $132

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