itrsteve

Not to muddy up a good thread with my problem, but hopefully it's helpful to others with the misfire issue so they can know what they may be getting into from a process perspective.

Since I threw a cyl 6 misfire - the dealer's suggestion was to swap the coil with cyl 4 and plugs with cyl 5 to isolate, I did that on Friday and first drive out on Saturday I was able to reproduce a fault immediately upon putting it under load (held the revs at ~7500 like you were throttling through a sweeper). They pulled the code again and the misfire stayed with cyl 6... So that's promising. They still have the car, so we'll have to see what's next, but my fingers are crossed.

AA996TT

I had the same issue, misfire on cylinder 6. They swapped the coils and it produced the same code. The dealership installed a new G engine and I am going through the break-in process currently. My car is a 2015 with 31,000 miles. The code came up while on track at Watkins Glen

rsbenfield

They will pull the head and look for the following...

https://rennlist.com/forums/991-gt3-...l#post16850134

slipaway37

Greetings,
I am a new 2014 991.1 owner, and the vehicle currently have approx 14k miles with only about 300 of my own thus far.
Can anyone please inform as to what I should be looking out for as 'warning signs?'
The car is CPO next two years, and of course we have the 10 yr extended engine warranty.
I find it exhausting trying to search so many thread's on the topic, and unlike the 996 IMS bearing issue, I cannot seem to pin-down what to possibly expect with this 991.1?
I hope like hell I should not be prepared for hot oil to hit the exhaust and burn the car to the ground like with some of the earlier 2013 models?
Thanks in advance!

Manifold

The car is generally solid and reliable, other than the engine problems. If the engine has a problem, you'll know it, so no point worrying about warning signs - just drive it and enjoy, knowing that you're covered by the warranty.

slipaway37

Appreciate your response. It just irks me that I could possibly have a catastrophic event while on vacation out in the "stix" when it happens, and I would probably not be able to use my local dealer whom I sincerely trust. etc.
I shall drive and hope for the best!
Thanks again.

itrsteve

As I understand it, the majority of the events caused by the finger follower issue simply trigger a misfire and put the car into limp mode. Shy of opening up the valve cover, there's not much to look for.

KA 991 GT3

I had no idea the new 4.0's had any issues. Can you elaborate a little more on this? is it widespread or some isolated issues?

Cay_PI

I have not heared of a lot of 2nd GEN 4.0 valvetrain failures. Only some (maybe 2-3 cases) that had catastrophic failures in the bottom end. but given the high production number and what the cars need to take on track I thinks thats very reliable. Amwesome engines, the old ones and the new ones.

itrsteve

Bad rumor - my G6 just arrived today. I had the finger follower issue only, even drove it to the dealer.



(sorry, I posted this in another thread already. But this one is one seems to be the main hub of information)

Manifold

After 7 weeks, I got my GT3 back today with its new (third) engine. The engine sounds and feels just like the previous ones, but I haven't wrung it out yet, and will not do so until I complete the recommended break-in process. My plan is to drive the car hard for the next four years while I still have the engine warranty.

Since I was getting a new engine, I had the car detailed and I must say, it's a really beautiful car, the aesthetics are timelessly sporty yet a touch understated, and I like the looks actually better than the 991.2 GT3.

As a side note, my dealer told me that his sales have been strong this year, even better than last year. Seems that there are plenty of people around who have money and are bored at home, so they're buying Porsches.

lsp408

what is the breakin process? 500 mile or 2000 miles?

Manifold

As I recall, it's 1200 miles, but I need to check. There's a debate about whether the recommended break-in is needed, but I figure that if Porsche recommends it, that's what I'll do.

itrsteve

My SA said “do whatever you want” but out of unecessary caution, I’m going to do 1200 as well.

It’s going to take many months to do this time of year.

I’m shocked yours took seven weeks, that’s nuts.

Manifold

I think it's partly because of the dealer not giving it much urgency. I would have pushed for compensation or a loaner car if this was my only car (it's not), but Porsche has generally been good to me, I'm happy to be getting a brand new engine again after logging many thousands of track miles in the car, and I wouldn't have driven the car much over the past 7 weeks anyway.

Yes, it will take some effort to break in the engine over the winter, but I want to get it done by March, in time for the track season.