981S - Acceleration not very smooth - is this normal?
#76
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Thread Starter
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Is this the one you bought that came with an O-ring?
https://www.suncoastparts.com/product/SKU981CXCAPS.html
https://www.suncoastparts.com/product/SKU981CXCAPS.html
this is the actual oil cap.
SKU: 98110703508
#77
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I’ve been reading about carbon build-up on the intake valves on our DFI engines and was wondering if you looked into doing a walnut blast or similar? For example: https://www.planet-9.com/threads/bef...981-cs.255957/
I’ll probably go ahead and order the oil cap anyway but am pretty confident I’m going to end up needing to blast the intake ports.
Thanks.
#78
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Hi @Sajan @subshooter sorry to bump a pretty old thread but I had a question for anyone that was having similar hesitation/stumbling issues and resolved it.
I’ve been reading about carbon build-up on the intake valves on our DFI engines and was wondering if you looked into doing a walnut blast or similar? For example: https://www.planet-9.com/threads/bef...981-cs.255957/
I’ll probably go ahead and order the oil cap anyway but am pretty confident I’m going to end up needing to blast the intake ports.
Thanks.
I’ve been reading about carbon build-up on the intake valves on our DFI engines and was wondering if you looked into doing a walnut blast or similar? For example: https://www.planet-9.com/threads/bef...981-cs.255957/
I’ll probably go ahead and order the oil cap anyway but am pretty confident I’m going to end up needing to blast the intake ports.
Thanks.
My conclusion on this is it's related to crankcase pressure.
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rezilient (08-06-2024)
#79
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My ‘15 cayman S has/had this issue of a hard stutter or power cut between 2200-2600 under partial throttle.
I loaded the Cobb OTS ecu/tcu tune and that definitely helped minimize the issue but it’s not totally gone.
Checked my oil cap and I do not have the o-ring. Ordered the part from Subcoast and will report back.
When checking the oil cap o-ring I noticed a lot of oil had burped back up into the cap area. I had just completed and oil change so I’d imagine there was some excess oil not drained into the sump, but I don’t think pressure should be escaping through that area forcing oil back up the tube.
I loaded the Cobb OTS ecu/tcu tune and that definitely helped minimize the issue but it’s not totally gone.
Checked my oil cap and I do not have the o-ring. Ordered the part from Subcoast and will report back.
When checking the oil cap o-ring I noticed a lot of oil had burped back up into the cap area. I had just completed and oil change so I’d imagine there was some excess oil not drained into the sump, but I don’t think pressure should be escaping through that area forcing oil back up the tube.
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Sajan (08-08-2024)
#80
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My ‘15 cayman S has/had this issue of a hard stutter or power cut between 2200-2600 under partial throttle.
I loaded the Cobb OTS ecu/tcu tune and that definitely helped minimize the issue but it’s not totally gone.
Checked my oil cap and I do not have the o-ring. Ordered the part from Subcoast and will report back.
When checking the oil cap o-ring I noticed a lot of oil had burped back up into the cap area. I had just completed and oil change so I’d imagine there was some excess oil not drained into the sump, but I don’t think pressure should be escaping through that area forcing oil back up the tube.
I loaded the Cobb OTS ecu/tcu tune and that definitely helped minimize the issue but it’s not totally gone.
Checked my oil cap and I do not have the o-ring. Ordered the part from Subcoast and will report back.
When checking the oil cap o-ring I noticed a lot of oil had burped back up into the cap area. I had just completed and oil change so I’d imagine there was some excess oil not drained into the sump, but I don’t think pressure should be escaping through that area forcing oil back up the tube.
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T-Design9 : Mods and ergonomic accessories bespoke designed for Porsche cars
Memory Modules : remember SC **** settings; A/S/S, PSE, Spoiler, Sport/+ buttons
Phone Mounts : keep your phone up and close and charged
Cupdholders, Sunglass Holsters and more at T-Design9.com
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rezilient (08-16-2024)
#81
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My well maintained 2013 Boxster S with 115,000km was also experiencing at bit of "stumbling" around 2500rpm.
It had the factory oil cap with the missing upper o-ring and had oil residue all under the cap.
I ordered a cap from the Porsche dealer for $30 CDN all-in and have been running it for a week now (400km)
I believe the hesitation is now gone or at least materially reduced! Go figure
Thanks for hard debugging work the recommendation to try this easy / cheap fix.
It had the factory oil cap with the missing upper o-ring and had oil residue all under the cap.
I ordered a cap from the Porsche dealer for $30 CDN all-in and have been running it for a week now (400km)
I believe the hesitation is now gone or at least materially reduced! Go figure
Thanks for hard debugging work the recommendation to try this easy / cheap fix.
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Sajan (08-15-2024)
#82
Instructor
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I never felt my 981 base accelerated smoothly from lowish revs and the Softronic tune 100% eliminated that - and of course made it feel stronger too. I think it's a trait of the car, that the careful attention of a tuner such as Softronic can eliminate.
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rezilient (08-16-2024)
#83
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
My well maintained 2013 Boxster S with 115,000km was also experiencing at bit of "stumbling" around 2500rpm.
It had the factory oil cap with the missing upper o-ring and had oil residue all under the cap.
I ordered a cap from the Porsche dealer for $30 CDN all-in and have been running it for a week now (400km)
I believe the hesitation is now gone or at least materially reduced! Go figure
Thanks for hard debugging work the recommendation to try this easy / cheap fix.
It had the factory oil cap with the missing upper o-ring and had oil residue all under the cap.
I ordered a cap from the Porsche dealer for $30 CDN all-in and have been running it for a week now (400km)
I believe the hesitation is now gone or at least materially reduced! Go figure
Thanks for hard debugging work the recommendation to try this easy / cheap fix.
#84
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I need to try this, thanks for the input!