YOUR RESEARCHRev surge on start-up...
1 matching discussions were examined; no attributable action/outcome evidence was detected. No consensus or repair conclusion is claimed.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Read captured repliesInsufficient extracted evidence does not mean there is no answer in the original discussions.
1 matching discussions · 5 captured posts examined · 0 partial discussions
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.
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: 20261027T013556Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
My '99 996 C4 very occasionally produces a surge of revs just after starting the engine. It's not that significant, but is this normal? Have others experienced the same? However, I don't experience the rough idle that has been discussed recently - well, maybe twice in the last 4 months.
That's normal. Wouldn't worry about it, unless it's surging up and down like a yo-yo .
My engine does this as well. Almost every time I start it. Huge surge of revs, then right to idle. LOUD because the oil has not started moving yet. Then the pressure goes up. It only does this when cold or first start of the day. When warm it is quiet and does not surge. Destined for engine failure??
Thanks for the prompt responses. No there's no yo-yoing of the revs, just the initial surge and then it settles down to a normal idle speed. You've put my mind at ease now!
Nedd to check if that happens on my car as I enjoy the sound of my exhaust at startup. I think it's not something to worry about if it doesn't do that when it's warmed up. Regards. Mike
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