Richard Zellmer

on a related note.. anyone recommend a good shop light for under hood work. I have really good lighting in the shop but ceiling is low so the hood blocks out engine bay.

I did a stupid thing - I was changing the sparkplugs and I left my halagon light in the engine bay and it tipped over. It melted the Porsche writing on what I belive the manifold cover. I did some part searchng and everyting seems to indicate the whole manifold is a single $500 part. I am hoping someone can tell me I am wrong. -Picture attachesd is before I put light on it.. it is the paint on the right side silver section where the porsche writing is where I did the damage. it is totally functional just looks ugly

Assuming that value shows up as engine temp it appears to at least generally work as the value was okay the few times i spot checked it.. My plan is to check fuel pressure this weekend and I agree if I can replicate the no start condition it would be worth while seeing if spark is present. This will help me tell if the no start and rough idle are same problem or two problems. Thanks all for the help. Will post back after I test some more.. I do also have new plugs and air filter coming mostly because I don't know when last owner changed them. I wouldn't think either of this could cause these problems without error codes but couldn't hurt none the less.

I did get another code later - At least it is in the same family. camshaft rather in the crankshaft... :) P0010 - Inlet camshaft control||bank 1 slow - Implausible signal, test conditions are not-completed, fault is currently active and is not causing a DTC light My one concern is would crank position sensor problem match with the fact that in addition to starting problems the last few starts have had a bit of a rough idle until it warms up a bit? Ahsai - Are you saying that if it cant find the crank position it suppresses the spark completely. If so, it seems like this could explain a total start failure but might not be the cause of my rough idling on the last few starts. .

I had trouble starting today and it did generate two errors (both same). Code below - What is interesting is google searches on P0822 have almost no info. 'Porsche and P0822' only returns 1500 matches and only one seems relate to this issue and it is just a page that lists Porsche codes. P0822 - Crankshaft position sensor "A"||circuit range/performance - Implausible signal, test conditions are not-completed, fault is not currently active and is not causing a DTC light I am not sure if this is a symptom of the problem or just a code that is spun based on the fact that it didnt start. investigation continues.

Well I think the next stop is for me to play with Durametric and a fuel pressure gauge and track this down...

Loren - Since I dont get any MAF faults and from the way it sounds I dont disagree that fuel delivery is more likely. I am going to run a fuel pressure test tonight. Found procedure here http://forums.rennlist.com/rennforums/porsche-cayenne-forum/590120-cayenne-s-stalling-problems-how-do-i-test-the-fuel-pump-2.html so will follow this unless I see a better solution to test fuel delivery. the kicker is that is always starts fine in my garage(where I keep it 99% of the time) but the last two times I parked it ouside in my driveway it gave me a hell of a time to starting the next morning. If my wife is running errands she doesnt hard time restarting on the return trip but that could be because the engine is still slightly warm. I am in NJ so it is cold this time of year.

I will have to check again tonight but I though when I ran durmetric (before it caused my laptop to crash) I only saw the measure of flow availble in durametric, not the voltage. On a 2008 Cayenne base should I expect to be able to see MAF voltage? I have MAF cleaner coming tomorrow from amazon.

I finally got durametric. No faults/code found. I did turn on some monitoring for the values from the MAF but other then the values go up when I hit the gas I dont know what the proper ranges are. Any pointers on how to use Durametric to diagonis the MAF sensor?

Thanks... I am going order Durametric. My open question at this point would be - do I need to have a 'check engine ' indicator on to indicate there is codes that the durametric can find? I release this sofware can pull a lot of values out of the cars computer. My specfic question I guess is 'do all error codes that durametric can pull down also trigger an indicator on the dash that there are error codes?'

In December I bought what I believe is a well maintained 2008 Cayenne base with 67K miles We normally keep in the garage - temp about 50F. It always starts fine from garage. However there have been a few occasions where we put a different car in the garage and parked it outside. Twice when parked outside it took numerous attempts to start. Last night was one of them, and it took a good 10 tries over 10 minutes to get it to start. The only difference from being in the garage is temp and the fact that the driveway is on a 15 degree hill. As mentioned above it always started okay from the garage but I did notice a slightly rough idle for first 30 seconds on a few occasions. Based on the slightly rough idle at startup i am thinking the cold and/or hill just exacerbates the problem and isnt the root case. I am in the process of getting the servicing dealer to send me the service records but was looking for some ideas and had a few questions Seems like likely candidates here are fuel or spark. 1) I was thinking about purchasing Durametric software. Can I have error codes that Durametric would pick up without having a check engine light? I dont have the check engine light on and was wondering if I were to have codes would I always have a 'check engine' warning. 2)Plugs/Coils and their codes - I am confirming when the plugs were last replaced but if replaced on schedule at 40K I am not that far way from another replacement. They are check enough to just replace. If plugs/coils need replacement should I expect to see codes in durametric? Or is there a likelyhood of them needing replacement without any codes? 3) Other logical source of issue would be fuel delivery. Does this or any software measure pressure? Would a fuel pressure gauge be a iogical purchase to run this down? Weekend will be the first chance to really take a look so trying to figure out what (if any) parts/tools to order in advance. Any other thoughts for root cause?