dd356

I didn't have the time to read through all of this so I apologize in advance if this was asked, but did you get gas not long before you did the work? Ie bad gas possible?

LIke bad batteries, fuel contamination issues can cause some crazy behavior and warnings on some high end cars/systems.

Watson

Good question. Hopefully OP can tell us if he can try another batch of fuel.

hcamp19

As a matter of fact I did. 1/2 tank the same day that this problem occurred.

hcamp19

I discovered another possibility, I may have been looking at an incorrect cylinder position map. Can any one tell me what the positions/numbers are for the cylinders on the 2017 3.0 twin turbo engine in my Carrera S? If I was not switching around the correct cylinders, it could be as simple as plugs or coil packs,

desmotesta

Has the IMS Bearing been replaced?

(Sorry I couldnt help it.. lol. Hope you find the culprit soon)

hcamp19

I don't need firing order, just cylinder location and numbers.

ddolbi

hcamp19

Thanks,
This is the same I was working off of but found something today to indicate it might be: driver's front to rear, 2,4 6, pass. side 1,3,5.

Fullyield

That was probably for the flat six in the mid-engined Cayman/Boxster as the engine is inverted 180 degrees.

dd356

I'm not an expert, but injectors can get clogged due to impurities in fuel or the tank, and water in the gas(more often in new cars) causes a lot of the types of behavior your seeing with the car running. I think there is a test kit for water once you siphon some out. Water contaminating gas often is symptomatic where you can start it, but it will run and fade out. If nothing else works, given you just added gas I'd check it. It doesn't sound like you were around snow or anything that could have gotten in there by accident, but i'm guessing some of the readers have gotten water contaminated gas before. In this day and age, nothing surprises me.

hcamp19

Thanks, I don't discount anything at this point but am done trying to evaluate it myself. I will take it Friday to an indie that was recommended and they will look at it starting Friday or Monday. I will post results when known. Bought it new 4 years ago January and, between drought and parking during Covid, I don't think I have ever even driven it in the rain!

RennListUser01

This is an interesting mystery! Really irritating to the OP, though. We feel for ya, brother!

So, the car ran fine for 35 miles, then spirited driving ... THEN malfunctioned.
- multiple warnings point to something upstream of the coils? (I don't gave a frame of reference on 911s-when one coil is bad, does it feel like running on 5?, and does one bad coil cause all those other warnings?) Seems like more than one cylinder is affected.
- heat caused something to fail (like a position sensor)
- vibration caused an upstream connector to slip apart?
- vibration caused a wire that was moved to rub?
- vacuum hoses? (these are easy to forget or to put on then pull part way off while closing up from the work)
- brake fluid ... hmmm ... does this service get close to wiring in the frunk?
- fuses all good? (something shorted after spirited driving?)
- plugs from same "batch?"
- plugs not correct range? wrong length? (I know, OP - not trying to be offensive, just riffing)
- any water involved that could affect electrical connections?
- fans reconnected?

OK - everyone is thinking of "the answer." Hope it is something simple. Here's a link for a coil pack problem - sounds a bit like yours - coil failure starts ECU light show ... https://rennlist.com/forums/991/1065...s-wrong-2.html

Question from a newbie - why would one change plugs with 10,000 miles if the engine was running ok?

NI3

Hope this follows my gut feeling that it is minor. Good luck Brother.

Noah Fect

The concern is that their threads will seize in the aluminum housing if left unchanged for too long. Dissimilar metals are never 100% compatible, in terms of thermal and electrical properties. Antiseize can help with that, but it can also affect the plug's ability to shed heat, as I understand it.

Probably the #1 reason is the guaranteed employment clause in the dealership license agreement with Porsche. Somebody has to pay for all that free espresso, the 18' gas fireplace, and those awesome service bay doors that open in like 300 milliseconds when you pull up to them.

RennListUser01

Ha, yeah.

However, my hundreds (nay, more likely thousands if one includes lawnmowers and chainsaws) of spark plug encounters with aluminum heads point to even a drop of oil, or grease working wonders. Once I had enough disposable income I bought some anti-seize 😀

That this microscopic coating would affect thermal transmissibility is more of a dilemma for satellite engineers., likely.