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YOUR RESEARCHCar wont start when engine is warm (no crank)
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"intermittent" the correct wording becomes even more important
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Suspected cause
If the problem is "intermittent" the correct wording becomes even more important.
Leading evidence: '"intermittent" the correct wording becomes even more important' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is '"intermittent" the correct wording becomes even more important' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Replace starter as noted in this thread' (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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Suggestion
If you know that the car is not "cranking", then without a doubt plan to replace the starter as noted in this thread.
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15 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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1 acknowledgements have no verified action link; they do not establish a repair result.
Outcome without a verified action link
It solved the problem and been good to go for many years.
Hi! So I have this problem with my C4S I recently bought, that it will not start when the engine gets warm/hot. This happened couple of times when I drove a little bit longer, the engine gets warm and I shut down the car. When I try to start the car after a minute or two, turn the key and nothing happens. It wont crank. I wait maybe 5-10 minutes and let the car cool down and it starts again like nothing ever happened. What do you think might be the problem here?
You sure? I don't know if it is true for Porsche, but for most cars a bad crank sensor will let it crank forever but not fire.
No crank on a Porsche with a bad sensor?
Not absolute, but pretty sure.
I've read this kind of thing countless times. People will say "it didn't crank", but what they're really mean it didn't start or "fire up" even though the crank was moving.
As these cars are now over the 20-year mark, the crank position sensor failures are becoming a common problem.
Of course, if the crank is not moving, then the starter is suspect.
First start with some simple checks (1) voltage across battery terminals (2) a solid 12+V at the jumper point in the engine bay (3) solid ground from the engine to the frame (4) does anything change if you wiggle the ignition key? (5) if no cranking occurs at all then it is the starter.
It has been years, but when mine did this it simply failed to crank if the engine was warmed up. If I waited 15 minutes it would start right up. I bought a new starter on Amazon. It solved the problem and been good to go for many years.
If you know that the car is not "cranking", then without a doubt plan to replace the starter as noted in this thread. While you're in there, it's smart to install a fresh crankshaft sensor.
Listen to Joe's advice.... and to be nice, acknowledge that you've seen his posts. Lately, he thinks no one reads his posts or is invisible. We all need Joe around and so please reach out to him. Share the love and a virtual hug or two! lol
Correct "wording" is very important here. It has always been a pet peeve of mine when trying to help someone but there choice of words doesn't help, it actually misleads the diagnostic tree/routine .
Won't "crank" means : the engine physically won't spin, as in turning over by hand, like the old " t-Model Fords" with a "hand crank".
Won't "start" means::: that the engine is "cranking" or turning over /spinning fine and fast , but fails to "ignite".
"Slow to crank" means ::: that the engine spins slowly, has difficulty in spinning, will not spin fast enough to "ignite"
"Slow to start" means :: that the engine spins fast and normal, but has to spin for a long period of time before it "ignites"..
If the problem is "intermittent" the correct wording becomes even more important. Some failed parts will only fit one of the 4 scenario wordings listed, some will fit more but to be able to verbally trouble shoot an issue that can be caused by many parts the exact symptom must be understood.
I understand, but even though English is not my first language, I still think the car is not in fact cranking. As in when I turn the key, nothing happens, I dont hear or feel anything. Also something I noticed (and failed to mention) is that I have an automatic gearbox and the car wont start or even crank on P, but it started once when I put the shift on N. Could there also be a problem with the transmission somewhere not allowing the car to start when hot?
Haha I understand! Im not trying to be rude
Maybe I still need to practise my forum etiquette. And thanks to Joe! I have seen and read your posts. I appreciate all the help!
Edit: And now I made two separate replies instead of just one...
Your English is not too bad, in fact it is more precise than a lot of people who has English as a first language (perhaps because you have to try harder?)
But you bring up a good point, if you can make the car crank and start by moving the gear lever to "N", there is a "neutral safety switch on the Tiptronic that could be at fault or the gear linkage may be maladjusted.
This is a source reference. Confirm exact model applicability in the original material.
