Car Dies

[Stl-986]

Believe it was #3 where it was mentioned there were misfires so blackish plugs would make sense in that aspect. What is causing the misfires though I think is the issue.

Can't remember, but did you try swapping coils from bank 1 to bank 2 to see if the misfires follow?

Offer to do a zoom to look through duramtric still stands. With a cold engine here is what I would capture:
rpm
oil temp
misfire cylinder 1-6

Do it with a cold engine, let it get up to temp, then export to a CSV file and link to it here.

What I noticed at one point with mine is that misfires would happen once the SAE turns off and then rpm's would fluctuate. the data from durametric is easy enough to graph out in Excel too so putting charts to things can help visualize things.

[blue62]

Originally Posted by Stl-986

Believe it was #3 where it was mentioned there were misfires so blackish plugs would make sense in that aspect. What is causing the misfires though I think is the issue.

Can't remember, but did you try swapping coils from bank 1 to bank 2 to see if the misfires follow?

Offer to do a zoom to look through duramtric still stands. With a cold engine here is what I would capture:
rpm
oil temp
misfire cylinder 1-6

Do it with a cold engine, let it get up to temp, then export to a CSV file and link to it here.

What I noticed at one point with mine is that misfires would happen once the SAE turns off and then rpm's would fluctuate. the data from durametric is easy enough to graph out in Excel too so putting charts to things can help visualize things.

Swapping coils from one bank to the other can only tell you if the coil is good or not.
There is nothing wrong with doing that as a test.
It tells you if the coil is good or not.
But it is an incomplete test.
The coil and spark plug needs to be tested on the head = cylinder that has the misfires. A coil and or spark plug will not fire if the wiring to the coil or plug is faulty no matter how good the coil or plug is

[gabedrummin]

https://www.youtube.com/watch?v=T70D3jJ_CfA This is the vacuum test I did today with a hot motor and a very long vacuum line . Way different from yesterdays results ? Guess I should of done this on a hot motor . Coils have been moved from bank 1 to 2 the plugs from cylinder 6 to 4 . Miss remains on 4 .The dark plugs are from bank 1 the whiter ones from bank 2 .The miss is on bank 2 . I don't see how you can change injectors in the car? Maybe on bank 1 but with the air cleaner in the way on bank 2 I don't think so. I have another set of heads on the motor with low oil pressure I guess I have to start saving some money to get the heads re-done pull the motor replace the injectors with the motor out. I wish Porsche could tell me its your head or injectors . They made no mention of a bad valve only needing coils and injectors . I don't trust the dealer . I feel like after spending 2200 they would say I need to spend more money ,if it still showed a miss .I got charged 904.00 dollars to change out a mass-air flow sensor .The simplest thing possible .It made no difference and they had the audacity to say it runs better.When it runs the same no change at all .You all are the best thank you so much for all your help .Thank you.