ogun228

All fluids OK. Shake only in 3rd full throttle.

Car is 05 C4S tip all stock except for Fister exhaust. Lately I'm experiencing a severe shake in 3rd gear on manual upon entering a hilly highway at over 100mph. Tranny shifts normally at redline into 4th. What can possibly cause this unseemly shaking? Would appreciate help, suggestions in trying for a cure. Tires are OK AFAIK. Thanks in advance.

Well, this C4S owner used his P-car all winter with dedicated snows (Blizzaks). Here in NJ roads are plowed quickly and I avoid going out until they are. Strange that I saw very few P-cars during my travels...guess they are mostly garage queens.

I have looked at the crest that's on the Porsche key fob...It seems to be the right size.

Have you thought that maybe your steering wheel was locked and that you simply unlocked it?

Yes! the oil pressure gauge does vary with speed, rpm etc...when warmed up, at idle it should be at about 2.

'05 C4S 19,150 engine replaced at 17K under warranty

Alf, These last few days have been pretty humid in Montclair so this may simply be moisture burning off. Keep monitoring for recurrence. BTW 1/3 oil level? Is that with warm engine?

66 '05 C4S

Yes and yes. Starts in 2nd to save gas. Moves as quickly as you accelerate again for mpg's sake. Yes the trans learns your driving style mainly senses when you are taking curves and holds lower gear. You'll get a feel for it.

Are you serious? Get to a qualified shop asap!

With all due respect, I beg to disagree. I feel that Porsche was very up front with me once they had determined the fault. The CPO warranty was honored, they provided me with a free loaner( Panamera 4) and I was otherwise treated well. They showed me pics of the engine internals and explained what had happened. What more could I ask for? As to the 2 year warranty bit, it does make sense to me since I paid nothing, not a farthing. From their point of view, the remaining warranty remains in force. If I had footed the bill, then a new 2 year warranty would have been given. Overall, I'm pretty pleased...As to the break-in period, I'm adhering to the manual's recommendation.

The invoice reads: " Found timing faults from both side cams.Remove oil and inspect for metal. Found metal in filters. Remove cylinder head covers, inspected cams and chains. Found broken ramp for tensioner and valves bent. Intermediate shaft failed and there is large metal debris in chain box. Remove and replace engine assembly. Swap over necessary parts. Reflange transmission to engine and reassemble to test and recheck" " Automatic transmission unflanged+flanged Automatic transmission cleaned and refilled"

It's the temperature sensorand if you have the temp on "auto" it adjusts the air con and the heat.

Update... I just returned from picking the car up. The dealer, Paul Miller Porsche in Parsippany, NJ was excellent. They succeeded in getting the information they needed from the PCM to satisfy Porsche NA's requirements. To do so they had to remove my aftermaket head unit and temporarily replace it with a CDR23...They got a reading and it was the Intermediate chain tensioner guide that broke with the result that the engine just shut off with the cam timings out of whack...They even showed me pictures of the internals with the metal debris within. They told me that this is a first in their experience. The complete engine was replaced and the only part canibalized from the old engine was the air box cover. The cost to Porsche, $21,645.24 parts and labor. It was explained to me that since all cost was borne by the manufacturer, the original warranty is the one that still covers the car; in my case for another 18 months. Had I had to pay for the repairs, I then would have a new 2 year coverage. I spoke to the tech who did the work and he assured me that there is no break in necessary since all break in is done at Porsche. All in all I have no complaints and only hope that this engine will last without any major problems. Thanks to every one who offered encouragements and/or advice.

Update. I just returned from the dealer and the engine is out of the car. The new engine will begin to be installed on Monday. All ancillary components, i.e alternator, hoses, air box etc will be canibalized from the "old" engine. After yesting, the assigned mechanic will drive the car and keep it overnight (I agreed to this) to insure that all'well. I'll probably get the car on Wednesday. I asked a lot of questions especially as pertains to the diagnosis of the cause of failure. While I am disappointed in the answer, I do underrstand the underlying economics. When the overall cost of engine dismantlement and replacement is factored in, compared to the cost of simply replacing the engine is factored in, Porsche opted to simply replace it. The closest the dealership can come to a diagnosis is that something internal caused the engine to throw it's timing. Perhaps a timing belt breakage and/or a broken sprocket(?). Cost of new engine is ~17.2k plus install for a total of about 25K. In any case the remanufactured engine will be installed. Now to the warranty: I was explained that the terms of the CPO warranty are such that any warranty will simply be whatever is left over from the original. In my case, another 6 months. Nice part of the saga is that I was given a 2011 Panamera4 as a loaner. Very nice, very luxurious, has everything. It's a big car, very nice to drive but does not have the immediacy of the 911. PDK, start/stop, you name it. Outside views, whether outside mirrors or retrovisor is rather restricted but the car is smooth as hell, fast too. I could see myself in this car but am sure I would miss the rawness of the 911 not to mention a price of ~123k. I will update this post next week when the C4S is returned.

Well, according to the Svce Mgr, the new(?) engine should arrive by week's end and I'll probably get the car sometime in mid-week next week. So, we'll see... Some of the things I'll be interested in finding out, beside the inability to get a DME reading, is the exact cause of the engine failure as the guy was kind of short on details. In addition, I'll ask about warranty(ies) on the new(?) engine and how that will affect my CPO status, meaning will it be in addition to it or separate. So far, I don't have anything negative to say about the service provided by the dealer, only that I am disappointed that a car with ~19k miles would suffer a type of failure that requires an engine replacement. I would have thought that by 2005, the issues plaguing the 996 would have been largely resolved. So much for that vaunted reliability.

I just got off the phone with the service Mgr and as far as I understand, it is the IMS after all. Apparently, there was something to do with the timing and although there were no noises and/or leaks, the conclusion is that the engine will be replaced. The Svce Mgr did give me some grief for the after- market sound system( Pioneer AVX) that prevented them from getting specific info on the engine but they could see that there was no evidence of overrevving etc... although he acknowledged that this has nothing to do with the engine. Bottom line a new engine has been ordered and it looks like PCNA will assume all costs. I'm still keeping my fingers crossed as the process while under way is not quite completed

The SA told me that they have eliminated the obvious, i.e fuel pump failure and/or clogged or ruptured fuel lines. In any case I did not smell fuel at the time of the incident. When I was at the dealer, they were draining the oil to take the engine out. The tech looked at me with sympathy when he intuited that the car was mine...Not very reassuring.

+1 Well, I just came back from the dealer's and to be fair, he hasn't explicitly said anything about PCNA not honoring the warranty but has definitely left the door opened to that possibility, mentioning readings of overev ect...I have never seen an overrev as when the rpm's reach redline, the Tip automatically upchanges. All maintenance has been up to date and oil changes done at 5k miles intervals. I don't think, based upon my readings here and in other forums that it's an IMS/RMS issue as there was no noise accompanying the event, as I said, stopped for a red light and the engine shuddered and died. I will update this topic as I get more info. The car was on a lift and a tech was working on it as I could see. I am reserving judgement. Thanks all.

My car is a 2005 996 C4S with tip. Last Thursday, while stopped at a red light, the engine shuddered and died. All my efforts to restart it were for nought although it turned over. After a tow to my nearest Porsche dealer and the New year delay, this a.m, the service adviser informed me that the engine somehow jumped time and that it will need disassemby to determine the cause. It gets interesting as the car is a CPO under Porsche warranty and I'm told that since I have an aftermarket audio system (Pioneer AVX), some readings can't be had from the PCM and until disassemby and no determination can be made as to PCNA's responsability for repair and or engine replacement. Car has currenly ~16k miles. Any comments or advice? Thanks

IMHO, TPMS were mandated by Big Brother because the average driver hardly ever checks his tire pressures thus leading to all sorts of negative handling. I had them in my 335 E90 and hated them as the warning lights with message would come on either with a 1 psi drop in one tire or a slight mismatch in all 4. I had to stop the car and re-initialize the TPMS as the lights and warning were annoying. If you are a car guy, and I believe you must be as you drive a P-car, I'm sure you check your tire pressures every 2 weeks as a matter of course. In addition, the cost of these gadgets is over the top and I believe that not all wheels will accept them. For a car guy they are a total waste unless they come pre-installed as of model year 2007.

Just like you would any other car.

I recently bought them and they are excellent, good construction and eapecially the retainers that are clips that don't come undone under your feet. Grabted they are a bit more expensive but IMO well worth it. Clips are like those found on back packs.