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Just throwing darts now.
http://www.pelicanparts.com/techarticles/Porsche-Cayenne/69-FUEL-Fixing_Common_Vacuum_Leaks/69-FUEL-Fixing_Common_Vacuum_Leaks.htm
Mine ran like crap when the crankcase ventilation valve diaphragm ripped. But its the vacuum leak that causes the trouble. I did get fuel trim fault codes though...
How much money do you think you've saved by going to this shop?
As a Porsche dealer tech, I can only laugh at the amount of parts these "mechanics" have thrown at your car....at your expense.
Sometimes it costs more to NOT use a dealership or at least a Porsche Indy shop.
thanks very much guys.. will have a look into the vacuum leaks tomorrow.. Will also do emissions test to see if it's running rich / lean.
81911: I get what you're saying, but up to this point I think the parts changed were reasonable:
1) camshaft sensor (diagnosed) (twice cheaper (£90=140usd) than a dealer) cost me an hour in labour (£20=30usd)
2) ignition coils (managed to get them 3 times cheaper (same brand)) than a dealer.
3) spark plugs (twice cheaper than a dealer)
spark plugs and ignition coils will probably cost me another hour or so in labour so another 30usd.
If the dealer really charges 7 hours in labour for changing the camshaft sensor (as mentioned in this forum) then only this fault would have cost me around £1300 to get changed...
I'm not sure how is in US, but here in UK the technicians at the dealerships are not the high end guys. My local dealer charges 240usd an hour and don't necessarily knows what they're doing so trying my best to avoid them.. to a degree that we will try to convert my friend's bosch kts 650 to Piwis.
How much money do you think you've saved by going to this shop?
As a Porsche dealer tech, I can only laugh at the amount of parts these "mechanics" have thrown at your car....at your expense.
Sometimes it costs more to NOT use a dealership or at least a Porsche Indy shop.
Dude, if only all mechanics at a dealership were competent. Let's not even start with SA head games and the pressures they face from management to generate income for the franchise. Myself and many others have fallen victim to the "stealership" too many times to blanket trust them. Sure there may be great dealerships and great mechanics out there. YAY and praise the baby jesus but I am so damned averse to dealerships at this point. No need to throw the OP under the bus for not wanting to take the car there.
I still like the fuel pump. When my 955's fuel pump went bad, it would briefly fire, wouldn't respond to throttle, then would die. The fuze trick didn't work at all. A pair of used pumps from a wreck and a couple hours at my indy and all was well.
While I'm glad that your cayenne is running great after putting in used pumps... if Fuel pumps are a wear item and its an annoying job — doesnt putting in used pumps up your risk of having to go in there again?
Shawn,
we also were thinking about this, but it's strange that the car seemed to be idling just fine once the engine reaches the temperature.. it does however run at 1500rpm but at least steady... I would have thought if pump is an issue, it would not be engine temperature related..
this is what we discovered today after taking the manifold off. There was a breather pipe which was actually snapped at that T shape connection. It looks like it's been repaired before and my only thought is that Porsche touched their fingers in this area as they changed the coolant pipes.
But would this affect the car running rough?? What you guys think? I will try to get hold of this T connection but Porsche might be selling the whole thing and I'm not sure where those pipes are going behind the engine..
I dunno what it is but repairing it before doing anything else would be a good starting point
I have heard others mention changing "T"s while doing the coolant pipe swap as a preventive measure, think they were related to the turbo (boost/vacuum/oil/whatever) somehow and I know they were at the back of the engine
There is a thread around here somewhere regarding the T replacement and the effects of its failure. Worth a look. I suspect this is a potential source of your issue.
Mine was broken when I had the intake off. I replaced the tee with a brass one and then got some fuel line from Napa to replace the broken plastic line per the link below.
08-05-2015 | 12:37 PM
