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Car shutting off while driving

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

Discussion summary

YOUR RESEARCHCar shutting off while driving

Leading reported evidence

Clean with electrical safe cleaner

Performed · outcome unconfirmed

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 performed work without a confirmed outcome
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.

Performed · outcome unconfirmed

Both can be cleaned with electrical safe cleaner.

Car shutting off while driving
Frequently discussed work

Clean maf thoroughly

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'd suggest removing the CAI, frankly and cleaning the MAF thoroughly to see if your problem is alleviated.

Car shutting off while driving
Read full discussion summary

Leading evidence: 'Clean with electrical safe cleaner' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'alleviated' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Clean maf thoroughly' (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.

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1 matching discussions · 11 captured posts examined · 0 partial discussions

Compare 3 other evidence results

alleviated

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'd suggest removing the CAI, frankly and cleaning the MAF thoroughly to see if your problem is alleviated.

Car shutting off while driving

Clean maf thoroughly

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'd suggest removing the CAI, frankly and cleaning the MAF thoroughly to see if your problem is alleviated.

Car shutting off while driving

Run where i pushed the clutch in and braked hard

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

Now that I think about it, it did do it once while coming down from a 120mph run, where I pushed the clutch in and braked hard.

Car shutting off while driving
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 maf thoroughly

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'd suggest removing the CAI, frankly and cleaning the MAF thoroughly to see if your problem is alleviated.

Car shutting off while driving

Clean with electrical safe cleaner

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that performed work without a confirmed outcome
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.

Performed · outcome unconfirmed

Both can be cleaned with electrical safe cleaner.

Car shutting off while driving

Run where i pushed the clutch in and braked hard

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

Now that I think about it, it did do it once while coming down from a 120mph run, where I pushed the clutch in and braked hard.

Car shutting off while driving
Reported and suspected causes (1)

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

alleviated

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'd suggest removing the CAI, frankly and cleaning the MAF thoroughly to see if your problem is alleviated.

Car shutting off while driving
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.

11 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: 20261026T122219Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

New issue with the 996: Car starts and runs great but it is just sometimes that it will cut off at speed. Usually when slowing down and the car is not in gear. It hasnt been that much of an issue because I just put it back in gear and let out the clutch, but it as done it probably 5 times total now. Any ideas of what it could be?

POST 2Original post

This doesn't address your question, but why would your ever take your car out of gear while it is moving? What year car? C2 or C4?

POST 3Original post

Maybe the last few seconds before coming to a stop at a traffic light ?

POST 4 / ORIGINAL POSTEROriginal post

Precisously the reason and that is when it happens.... It is a 99 C2.

POST 5Original post

Well, then you should not have not said "at speed". Does the car idle after you start it? Does it only stall while reving down from a higher engine speed while driving? If you sit there and rev the engine and let up on the gas, does it stall then? What is the warm idle reading? Does it have the same symptoms when first started cold? Do you have a scanner?

POST 6Original post

Sounds mass air related or possibly the idle-air bypass valve acting up.

POST 8 / ORIGINAL POSTEROriginal post

Nice, it could be the K&N then huh? It idles fine, It does it when from reving down from a higher engine speed while driving. Now that I think about it, it did do it once while coming down from a 120mph run, where I pushed the clutch in and braked hard. Where is the idle-air bypass valve? the mass air flow only has like 6K on it.....

POST 9Original post

Idle air bypass is on the throttle body, it has an electrical plug on it (smaller than the e-gas actuator). It is possible that oil from the K&N got onto the mass air. Idle air directs air around the butterfly at idle so if it is clogged, air will be restricted into the motor, whereas the mass air could be tricked from oil contamination. Both can be cleaned with electrical safe cleaner.

POST 10Original post

Cohare, it is definitely as a result of installing the K&N CAI. Something has gotten fouled by the K&N, the MAF sensor, or both. Do a search on the forum and you'll find that this characteristic flaw has been noted by some other drivers as well. I'd suggest removing the CAI, frankly and cleaning the MAF thoroughly to see if your problem is alleviated.

POST 11Original post

This has happened to my car exactly twice since installing the K&N cold air kit about 3 months ago. Both times were immediately after spirited driving, then coming to a stop sign. I depressed the clutch & threw it into neutral.....the car died, but started right up before I came to a stop. Never had any other problems. - Cam

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