Porsche Club GB

996 Misfire then clears

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5 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

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YOUR RESEARCH996 Misfire then clears

Leading reported evidence

Check registered faults

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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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
you may have a coil pack on its way out , worth getting it on a diag machine to check for registered faults
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996 Misfire then clears

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Leading evidence: 'Check registered faults' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check registered faults' (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.

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1 matching discussions · 5 captured posts examined · 0 partial discussions

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Run on half the cylinders

Suggestion or failed attempt

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
Recently had a PSE fitted to my 03 C4 Cab with the switch, runs and sounds great ,till tonight, pulled the car out of the garage ( I always close the baffles before starting ) to give it a clean and decided to drive it round the block, whilst driving I operated the exhaust switch 2 or 3 times, as I went to accelerate the engine started to act as though it was running on half the cylinders.
Original post Read captured discussion
996 Misfire then clears

Frequently discussed actions (2)

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

Check registered faults

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
you may have a coil pack on its way out , worth getting it on a diag machine to check for registered faults
Original post Read captured discussion
996 Misfire then clears

Run on half the cylinders

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
Recently had a PSE fitted to my 03 C4 Cab with the switch, runs and sounds great ,till tonight, pulled the car out of the garage ( I always close the baffles before starting ) to give it a clean and decided to drive it round the block, whilst driving I operated the exhaust switch 2 or 3 times, as I went to accelerate the engine started to act as though it was running on half the cylinders.
Original post Read captured discussion
996 Misfire then clears

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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.

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

Porsche Club GB: 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: 20261027T082735Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Recently had a PSE fitted to my 03 C4 Cab with the switch, runs and sounds great ,till tonight, pulled the car out of the garage ( I always close the baffles before starting ) to give it a clean and decided to drive it round the block, whilst driving I operated the exhaust switch 2 or 3 times, as I went to accelerate the engine started to act as though it was running on half the cylinders. On the dash a symbol came up that looked like an engine with the word check in it and in the computer bit it said engine fault take the car to a dealer ( or something similar ). I put the car back in the garage 2 hours later after reading the manual Iwent back to it , started it and took it out where surprisingly it performed superbly. As anyone any ideas ?, could it be I switched the exhaust off and on acouple of times ,the engine was still cold when I did it. Steve One other thing, in the log in it says I'm not a PCGB member when I am ?.

POST 2Original post

you may have a coil pack on its way out , worth getting it on a diag machine to check for registered faults

POST 3Original post

if you had just given it a clean, you may have got some water around the coil packs if too vigorous with the under arch spraying. It has happened to me before. I'm just more careful now and it has never recurred.

POST 4Original post

Welcome Steve! What they said, plus take a look here: http://www.porscheclubgbforum.com/tm.asp?m=70284

POST 5 / ORIGINAL POSTEROriginal post

Thank you it was a coil pack, took the car to the Porsche shop Halesowen who did it there and then even though it was there open day, so many thanks to them, they couldn't believe it had not shown problems before ,it was soo bad. Steve

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