Advice please on major hiccough!

[jl-c]

2005 997S 3.8 Couple of days ago I was driving to work as normal, all dash indications normal and up to operating temperature. The whole car 'hiccoughed' the engine just appeared to stop dead for half a second and then resumed as normal. No lights came on not even a rpm drop that I saw,nothing out of the ordinary. Connected durametric, no fault codes stored at all. Monitored cam deviation angles v rpm throughout the range from idle to 6000 rpm, all good. The only thing I did before the journey was to top up the oil by 0.4 L bringing the level up to 3 bars rather than 2 bars full. This has happened just the once so far, but it is concerning me. The only thing that I saw that was unusual was that when I turned it off the oil pressure gauge stayed reading 1 bar. Turned ignition on and off and it dropped to zero. Anyone got any idea what might have happened?

[j_beede]

My MY05 997.1 coupe's oil level indicator has 5 bars--I believe. Three large bars between the MIN and MAX levels plus a smaller bar below MIN and another small bar above MAX. In the owner's manual it seems to say that the max fill level is 4 bars. Is it your preference to keep your level at 3 bars?

 

The two "events" you describe sound consistent with an electrical "glitch" in my opinion. For the pressure gauge to show a non-zero value with the ignition off suggests a grounding fault. I will have to take a look at my pressure gauge during idle, then with the ignition switch off, then with the key out.

...j

[jl-c]

I think you may be confusing level with pressure. In the UK we have oil pressure gauges in "bar" which is approx 14.5 PSI, it was the oil pressure I referred to. Normal running is approx 3.5 bar or 195.8 PSI ! Thank you for at least responding, I was beginning to think everyone had gone home  :D , but it is obviously NOT a common event to happen. Not happened since so putting it down to duff fuel until proved otherwise.

[j_beede]

My error... from the sentence below it sounded like you were talking about oil level. Note: My oil level indicator is formatted like a stacked bar chart.

 

"The only thing I did before the journey was to top up the oil by 0.4 L bringing the level up to 3 bars rather than 2 bars full."

 

Theoretically we should be speaking the same language (though in the US "braces" go on your teeth, a "lift" is something you discuss with a plastic surgeon, and "stones" have nothing to do with the weight of your Porsche  :)).

 

Thanks for the pressure vocabulary lesson. It's been a while but I still recall atm, Torr, Pa, Boyle, Charles, and PV=nRT and other ideal gas law bits. I don't recall much from fluid mechanics. Odd.

 

I'll adjust my earlier comment by saying that your post-shutdown 1 bar reading could be a pressure sensor anomaly. I assume that disconnecting the oil sending unit would store a code, perhaps a resistive connection (hot or ground) would not?

 

Hopefully your 997 is in good nick these days. (Did I say that right?)

...j