11 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHHot starting problem
Reported or suspected cause
air flow sensor
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
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Reported cause
I had exactly the same problem with a 996 and it was the air flow sensor.
Leading evidence: 'air flow sensor' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'air flow sensor' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Use injector cleaner' (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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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
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Performed · outcome unconfirmed · Original poster
2 months ago, it had a major service and last month I used injector cleaner.
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.
911uk: 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: 20261027T035758Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi forum,
My 993 has developed an annoying 'hot starting' problem. Basically, when after a few short runs I want to start the car, it simply wont fire up. The starter motor turns over OK but no vrooooom.....
Normal, 'cold' starting is no problem.
2 months ago, it had a major service and last month I used injector cleaner.
Help please.....
Migration info. Legacy thread was 16600
latest.....car now sort of died on me whilst pulling away from the drive. First gear fine, then second and it felt like fuel starvation.....lights came on , had to re-start, did it again and then was fine. I then went on the motorway and had no problems. I reckon Bosch Hammer diagnostic will tell me more.........but I'd like some help.....
Migration info. Legacy thread was 16601
Air flow sensor is a straight forward parts swop, don't know about the 993 but the 996 and Boxster will report this fault in the fault log if the airflow sensor goes wrong. Normally when they go they get worse quickly and render the car undrivable as the engine won't run.
Sounds more likely to be either the fuel pump or the pressure regulator to me. Any OPC or independent should be able to tell you instantly (up to you if you get them to repair it once you know what it is).
Paul D (Just sold the GT3)
Migration info. Legacy thread was 16608
Is there an easy way for me to check if it is the air flow sensor? Being no good with spanners and such, where do I find this sensor in the engine bay?
In this months issue of 911 world, I saw a query on this subject for an older 911. Rusty connections were mentioned.....could this be the cse with a 993?
MK
Migration info. Legacy thread was 17181
OK, got the MAF replaced and the DME just in case.
The car is running fine now but.......hot starting still an issue.
After running it, switch the engine off, it takes a few attempts before it fires up again.......and only after some alarming clicking noises from the engine bay.
Has anyone had anything similar with their 993?
MK
Migration info. Legacy thread was 17735
I read somewhere that low fuel line pressure may be a cause.
i.e., if you have a leak of fuel or air somewhere in the fuel system, the car will be OK to start when it's cold, because it pressurises the system.
If it's hot, it thinks there will be enough pressure, so it doesn't pressurise. But, if you have a leak, there'll not be enough pressure - hence no start!
Migration info. Legacy thread was 17740
Clicking noises can happen if there's not enough charge in the battery to wake up starter motor - thought not sure why yours would decide to work after a few attempts...maybe loose connection to battery???
Migration info. Legacy thread was 17755
Phone Ray Northway near Reading 0118 971 4333 or any other local Porsche specialist maintainer - they usually can answer these questions in five minutes. Its not worth messing about and buying parts you dont need - or cocking it up through inexperience.
Migration info. Legacy thread was 17758
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