5 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHLumpy start on warm - Page 1 - Porsche General - PistonHeads UK
Leading reported evidence
Replace with the car since noticing the issue is
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
Only things that have changed with the car since noticing the issue is that I recently filled up with super unleaded (97RON) rather than the standard unleaded I had been using up to then.
Lumpy start on warm - Page 1 - Porsche General - PistonHeads UK
Frequently discussed work
Check of the car
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
They’re a Porsche specialist (race team owners etc) and did a full check of the car before sale with nothing to report… Problem is they’re about 150miles from me and I’m due to drive the car to France tomorrow eve.
Lumpy start on warm - Page 1 - Porsche General - PistonHeads UK
Read full discussion summary
Leading evidence: 'Replace with the car since noticing the issue is' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check of the car' (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 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
They’re a Porsche specialist (race team owners etc) and did a full check of the car before sale with nothing to report… Problem is they’re about 150miles from me and I’m due to drive the car to France tomorrow eve.
Lumpy start on warm - Page 1 - Porsche General - PistonHeads UK
Use fully mechanical injection
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
Based on experience with similar configuration engines that use fully mechanical injection with manual mixture control (Lycoming flat fours and flat sixes), my first thought is fuel vaporisation in the lines to the injectors - the car is essentially injecting vapour instead of liquid fuel.
Lumpy start on warm - Page 1 - Porsche General - PistonHeads UK
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.
Check of the car
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
They’re a Porsche specialist (race team owners etc) and did a full check of the car before sale with nothing to report… Problem is they’re about 150miles from me and I’m due to drive the car to France tomorrow eve.
Lumpy start on warm - Page 1 - Porsche General - PistonHeads UK
Replace with the car since noticing the issue is
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
Only things that have changed with the car since noticing the issue is that I recently filled up with super unleaded (97RON) rather than the standard unleaded I had been using up to then.
Lumpy start on warm - Page 1 - Porsche General - PistonHeads UK
Use fully mechanical injection
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
Based on experience with similar configuration engines that use fully mechanical injection with manual mixture control (Lycoming flat fours and flat sixes), my first thought is fuel vaporisation in the lines to the injectors - the car is essentially injecting vapour instead of liquid fuel.
Lumpy start on warm - Page 1 - Porsche General - PistonHeads UK
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.
5 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
PistonHeads: 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: 20261026T094842Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
FieldAtlanta said:
Hi all, I’ve got a Cayman 2.7 Gen 1 987 which I purchased around 1 month ago. 2007 car with 38k on it and I’ve driven about 500 trouble-free miles since buying. Until now…
I did a good 20 min of driving yesterday evening so the temp gauge was bang in the middle and everything nice and warm. Stopped for 5 mins (turning off the engine) and when I went to turn the ignition back on the car kind of turned over, ‘caught’ and spluttered a bit but didn’t actually start. Tried again and it turned over for a bit longer than a normal start but did start. Did another few rounds of on/off and seemed to be okay but still took an uncomfortable and unusual amount of time.
I’m wondering if anyone has any suggestions on how to approach this? I have 6 month RAC warranty from the dealer. They’re a Porsche specialist (race team owners etc) and did a full check of the car before sale with nothing to report… Problem is they’re about 150miles from me and I’m due to drive the car to France tomorrow eve.
Only things that have changed with the car since noticing the issue is that I recently filled up with super unleaded (97RON) rather than the standard unleaded I had been using up to then. Would this cause anything weird? Perhaps I just didn’t notice before as I’d rarely stopped the car and started again while warm?
Appreciate any suggestions on what to do.
I've the same car on 64k miles, owned 5 years. I've had a couple of instances in that time of what you described when doing a 'hot start' . Not sure how usual or unusual it is for the car but it's happened that few times I've never had it checked out.
Point of the post: I think it'll be ok, give the specialist a shout and see if they've come across it before from the description but carry on using it.
deebs said:
I've the same car on 64k miles, owned 5 years. I've had a couple of instances in that time of what you described when doing a 'hot start' . Not sure how usual or unusual it is for the car but it's happened that few times I've never had it checked out.
Point of the post: I think it'll be ok, give the specialist a shout and see if they've come across it before from the description but carry on using it.
Very strange! Have you ever had any battery replacements in that time? I haven’t got a trickle charger sorted yet (car is on driveway outside) but wonder if this may help?
Mine (987S 3.2) does this from time to time.
Based on experience with similar configuration engines that use fully mechanical injection with manual mixture control (Lycoming flat fours and flat sixes), my first thought is fuel vaporisation in the lines to the injectors - the car is essentially injecting vapour instead of liquid fuel.
Mine usually pulls this trick at petrol stations - it's just long enough for heat to soak into the fuel lines before I try to re-start it.
FieldAtlanta said:
deebs said:
I've the same car on 64k miles, owned 5 years. I've had a couple of instances in that time of what you described when doing a 'hot start' . Not sure how usual or unusual it is for the car but it's happened that few times I've never had it checked out.
Point of the post: I think it'll be ok, give the specialist a shout and see if they've come across it before from the description but carry on using it.
Very strange! Have you ever had any battery replacements in that time? I haven’t got a trickle charger sorted yet (car is on driveway outside) but wonder if this may help?
I've always managed to keep mine on a trickle charge. I have changed the battery this year, although I've barely driven it and it's such an infrequent occurrence I couldn't link the two at this point.
Like magnums experience above mine has predominantly done this at fuel stations from a hot start from memory.
