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Are you sure this works with E-gas? Pressing the throttle to the floor only opens the (7) throttles, if the ECU decides that's a good idea...
100%!!! American manufacturers have been doing it for years...and I believe it works for some Japanese manufacturers as well. It's absolutely extremely easy to implement : just program it through software into the ECU...if it sees full throttle with ignition On and no RPM signal,disable injector pulse...
If you don't want oil starvation during start up after an oil change there's a solution so simple it will blow one's mind. It's called " clear flood mode " . It makes so much sense for so many manufacturers,but perhaps for Porsche it makes more sense to drain half the oil. .After you're done with the oil change you mash the gas pedal to the floor and then crank the engine over. That will open the throttle bodies fully and the computer will know to completely disable the injectors. So you are basically spinning the engine over creating oil pressure,without actually firing,so there won't be any dry start up wear. Let go off the gas pedal and the engine will start...done.
I thought detecting acceptable oil pressure would be a prerequisite to ignition anyway. Surely ECU is programmed for that?
I thought detecting acceptable oil pressure would be a prerequisite to ignition anyway. Surely ECU is programmed for that?
Nope, it triggers a Check Engine Light if there is no pressure (that clears itself once pressure builds) but doesn't prevent ignition (this happens on every oil change on the 991 GT3, but not on the 992 GT3)...
I think the oil pump in the 3.0L Carrera motor is electric and could theoretically run before the engine is started (not sure if they do this or not), but the GT3 oil pump is mechanical and does not produce oil pressure until the engine is spinning.
Checking the oil level somewhat convoluted, engine gotta be warm, then got to be engine idling whilst it takes two minutes to measure 😳Almost like the ECU picking up multiple data points and then giving a processed output rather than just reading a plain 'ol sensor - guess thats a down side of a dry sump but much more involved thannmy previous P
Last edited by Mercuriell; 07-01-2022 at 03:12 AM.
Checking the oil level somewhat convoluted, engine gotta be warm, then got to be engine idling whilst it takes two minutes to measure 😳Almost like the ECU picking up multiple data points and then giving a processed output rather than just reading a plain 'ol sensor - guess thats a down side of a dry sump but much more involved thannmy previous P
Yes even in the dipstick days, dry sump cars need to be idling at operating temp…
I don’t know if anybody remembers the air cooled 911 oil gauges. When the engine was cold and they showed empty after the oil warmed up with the engine idling sitting on a flat surface then you could read the gauge and oil level .. even with the oil warm when you were driving it showed empty and unless you were sitting at a stop sign. Didn’t have any graduations on it or just a red dial add an icon.carl
I just started doing my own car maintenance and completed the minor maintenance on my 981 and 991.2 this afternoon. It's about $1300 at my dealership and I did it for under $200 and about 3 hours for both oil changes. I will get faster in the future.
Doing your own work is really fulfilling and fun. I enjoyed myself. I can't wait to do it on my GT3. Hopefully someone will post a DIY video at some point.
Last edited by subshooter; 07-01-2022 at 04:09 PM.
I just started doing my own car maintenance and completed the minor maintenance on my 981 and 991.2 this afternoon. It's about $1300 at my dealership and I did it for under $200 and about 3 hours for both oil changes. I will get faster in the future.
Doing your own work is really fulfilling and fun. I enjoyed myself. I can't wait to do it on my GT3. Hopefully someone will post a DIY video at some point.
Did you get any oil in your armpit? Ask me why I'm asking......frig***** GT4.......
Did you get any oil in your armpit? Ask me why I'm asking......frig***** GT4.......
lol. I know why you are asking. But no. Just on my hands but I was wearing mechanics gloves anyway. 991.2 was so much easier than the 981. At least I have a lift in my garage,
First oil change today. 4500 km.
I asked service advisor how many liters of oil they put in.
He said 8. I said I dont think so, I said I had read on line about most cars only taking 4 liters.
He called in the tech and asked how many liters. Tech says 6.5.
Invoice says 8. Hmmmmm..... where to go from here?
First oil change today. 4500 km.
I asked service advisor how many liters of oil they put in.
He said 8. I said I dont think so, I said I had read on line about most cars only taking 4 liters.
He called in the tech and asked how many liters. Tech says 6.5.
Invoice says 8. Hmmmmm..... where to go from here?
Interesting! Wonder if they just overcharged you or if they managed to drain additional oil?
Would have been interesting if they showed you which drains they used while your car was on the lift…
Doesn’t all dealer management software have estimations for all service procedures that they use for billing purposes?
For example, an oil change for GT3 model already has the consumables listed with prices and y amount of hours for labor. You are billed on these estimates, not on actuals.
So when the service manager entered a GT3 oil change into his software system as a line item, he/she looked at the oil capacity of a GT3 and it said 8 liters. That is what he/she entered into the SKU code of the GT3 oil change. And that is what you are charged.
And that is why a tech can bill 11 hours a day even though he only worked 8.
I remember dropping off a car for service and waiting. I sat in the waiting room and watched the car roll into the service bay. Started the timer on my watch. Ended the timer when the car rolled out of the service bay. Total was 1:32. I was charge for 4.5 hours of labor. That was a fun conversation (for me, not the service advisor)!
The stock answer is that all dealerships bill based on the formula in their systems, not actuals.
Argued a bit with my SA about the 4.5 qts, but he came back to me and said I was right - I think I was the first 992 GT3 oil change they did. The techs were not prepared and made some calls to verify.
06-29-2022, 12:06 PM
.After you're done with the oil change you mash the gas pedal to the floor and then crank the engine over. That will open the throttle bodies fully and the computer will know to completely disable the injectors. So you are basically spinning the engine over creating oil pressure,without actually firing,so there won't be any dry start up wear. Let go off the gas pedal and the engine will start...done.
