is it normal for 957 V8 to stumble at idle when oil cap removed?
#1
RL Community Team
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Thread Starter
is it normal for 957 V8 to stumble at idle when oil cap removed?
Hi Guys - I noticed on my 957 08 V8, when the oil cap is removed as the engine is idling, the engine will drop RPM and severely stumble and almost stall until the oil filling cap is replaced. No check engine light appears. Is that how they all work, or is this the sign of a PCV check valve malfunction? Anyone able to remove their oil cap and have the engine continue to run totally normal?
Thanks!
Thanks!
#4
Rennlist Member
I have had other cars that did that but never tried it with my piggy. Crankcases all run pressurized these days. Maybe it helps oil foaming. Not sure what else. Its part of the emissions system too.
#7
RL Community Team
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Thread Starter
Air-Oil separator check... seeing if it acted like the 996, which it does not! That's why it concerned me as a 996 will run with the oil filler off.
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#8
Race Director
At least in my case I was changing then refilling oil, wanted to get oil back in the filter before I added the last oil. Was surprised how poorly it ran.