18 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
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YOUR RESEARCHPlease listen to this 30 second clip - cold start issues
Leading reported evidence
Check /flushed the fuel rails
Performed · outcome unconfirmed
No successful repair reported for this finding.
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0
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1
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Please listen to this 30 second clip - cold start issues
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Leading evidence: 'Check /flushed the fuel rails' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'these sales arise' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check /flushed the fuel rails' (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.
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
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Please listen to this 30 second clip - cold start issues
Check intake/vacuum leaks
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Please listen to this 30 second clip - cold start issues
Check mass air flow sensor
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
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1
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Please listen to this 30 second clip - cold start issues
Clean throttle body
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Please listen to this 30 second clip - cold start issues
Reported and suspected causes (1)
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these sales arise
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Suspected cause
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Discussions that suspect a cause
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Suspected cause
Used to see sales advertised in Excellence Magazine of dealers offering various parts, wheels, tires, manuals, accessories, jackets, lighters, cups, pens, even engines, at substantial discounts (for instance I bought a full factory manual set (64lbs worth of manuals) for my 02 Boxster for $300 and originally this cost several thousand dollars) and I suspect these sales arise from a dealer unloading its overstocked parts department.
Please listen to this 30 second clip - cold start issues
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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.
18 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.
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Generation: 20261026T113718Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
http://www.youtube.com/watch?v=IU-m_MSaazA
On cold start up (sitting over night) then engine bogs down for the first minute if the throttle is blipped or try to take off slowly. In the audio clip, you can hear it from 18 - 29 seconds.
It's at the dealer and under CPO, but the tech was not sure from the sound clip, plus he doesn't have a long window to hear it. Once the secondary air pump shuts down, the throttle is normal. Nothing abnormal after that first minute. It's been happening for about 1 week.
Any ideas? I told the tech I would do some research to see what I can find. Maybe it will help him look in the right direction since he only has about 1 minute to listen. Of course he will see if there are any codes, but no CEL at this point.
How fresh is the gas? It may be stale gas and a blend for warmer weather.
If the gas is ok then my WAG is the engine's lean at cold start. I'd look at the engine coolant temp and intake air temp readings before start -- but with the key on -- and then monitor these readings during the engine's cold idle time.
Sincerely,
Macster.
Could be these after seeing similar postings in a few old posts. Keep the opinions coming. I'm going to email the tech tonight with some possible things to look for.
The tech just called me. He recommended this even though he doesn't think it's the injectors. He confirmed the noise and ran a few tests including fuel trims and they were normal, so it doesn't sound like a fuel mixture issue.
He thinks it could be carbon build up on the intake valves. As a hail mary, he's going to replace the MAF since it's still under CPO...gotta love these guys helping me with parts like this.
It will be documented and if it gets worse, hopefully PCNA will provide help after CPO coverage ends next month. Not sure if carbon build up is covered by any warranty whether new or CPO, but it didn't sound like it.
Welcome to my world....
If you don't give it any gas...just let it sit there...does it bog? Do the rpms drop and it sounds like its choking?
If so, you have EXACTLY what I have. The dealer has had my car 3 times looking for this issue.
As your tech to check for misfires with his computer when he does a cold start.
So far...my tech has:
Changed all the plugs
Replaced 2 injectors with new ones
Checked/flushed the fuel rails
Checked the MAF
Cleaned the throttle body
Checked the coils (4 are new from last year)
Checked for vacuum leak
So far, nothing he's done has corrected the problem. Personally, I'm starting to think there might be a glitch with the DME.
Let me know what you find out!!
sean
It does not bog unless I blip the throttle. If I blip it yes it sounds like it's choking. If I let it idle out until SAI shuts off (about 1 mintue), it's fine.
Picking it up today and will take it back next week when they get the MAF. Probably won't fix it, but I'll take a free MAF.
I'll ask if he checked misfires.
LOL...my Porsche dealer stocks oil change kits, air filters, spark plugs, wiper blades and some bulbs/fluids.
THATs it. Everything else must be ordered.
More and more Porsche dealers (and even other brands when I've had a chance to look into this) don't stock much in the way of parts anymore. My local dealer's parts department's 2nd floor is empty.
Parts manager tells me it is just too expensive to have a full set of parts. Also, IIRC the factory (PCNA) won't take back ordered parts even if they were unused.
Used to see sales advertised in Excellence Magazine of dealers offering various parts, wheels, tires, manuals, accessories, jackets, lighters, cups, pens, even engines, at substantial discounts (for instance I bought a full factory manual set (64lbs worth of manuals) for my 02 Boxster for $300 and originally this cost several thousand dollars) and I suspect these sales arise from a dealer unloading its overstocked parts department.
My local dealer can get stuff overnight if it puts the order in early enough in the day. Shipping cost is very high though. Word is Porsche uses 3 or 4 shippers rather just one (if it dealt with just one I think it could cut a better deal but what do I know...) and of course this really costs. Dealers have to pay the shipping cost. My dealer tells me it eats some of this cost because if it tried to pass the full cost on the customer... oh boy would the you know what hit the fan.
Could be worse. Couple of years ago, just west of Albuquerque, NM, my VW Golf TDi tossed its alternator belt (the alternator pulley failed) and the local VW dealer parts department quoted me quite a few business days in getting the necessary parts in unless I paid a 20% expedite fee. Either that or I sit in a motel room paying that cost and over the holidays too boot waiting for the parts to arrive on a slow USPS mail truck.
I paid the 20% fee but was so mad about it that vowed upon returning home I'd sell the VW and never buy another one again. I sold the car and so far have resisted buying another VW.
Sincerely,
Macster.
This is a source reference. Confirm exact model applicability in the original material.
