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ybe
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I can hear my pump sometimes but it more like a turbine or winning noise. Even though all connections are correct there have been stories of hoses coming loose in the tank from the pressure after driving
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Email?? Yes I believe it was the rubber seal/gasket peice that attaches the control arm bar to the engine it can crack basically loosening and can cause vibrations roughness and such but don't know If this is related to your problem but I'd check also since u been in doing 1000 other things anyway
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Yea I'd go ahead and replace that next since it's one of the cheapest and seems like u accessed it pretty quickly one thing about the cps is that it will work intermittently when it goes bad. kinda like the fuel pumps. Another thing that comes to mind would be to check the AOS brain. And I also recall reading a rough running Cayenne story were the guy replaced a lot of parts and said something about it being the control arm bar the rubber gaskets they were brittle and eroded he replaced so check the rubber on your control arms for cracks, erosion you could probably find the post search around
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Yea I was going to mention it's possible but I know people have messed around with the dme/ecu to no avail or it was temporary fix worth a try I guess pretty much loss without code that's the hardest thing about Porsches the no code faults leaves you with nothing but a process of elimination.. it's why a lot of people get rid of them
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Man..... now I'm wondering If it's something that's simply being overlooked like those 'BERU' coils what brand are your MAFS?
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Yea next up would be the crankshaft sensor if u search around the forums u can probably find the guys posts went through much of what u did then finally changed the crankshaft sensor and solved it. He had similar symptoms. I've also heard people throw around ignition switch causes wacky issues like this but not sure how wouldnt be my first place to look Also keep in mind 1 of the aftermarket parts u installed just may not be functioning its happened before it's why some techs rule against
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Oh ok I thought you said it does die when you pull fuse 14. It's not a check valve I think its a fuel purge valve something like that I'd have to find it but if you say your 2 fuel pumps seem to be working then yea check hoses replace the right side and if no solution it's probably your MAF which can cause the RPM fluctuation and other weird issues you are describing. I'm no expert but after Fuel pumps/purge valve and MAF the only other things that I can think of over the years of everything I've read on Cayennes that can cause these symptoms would be the TPS/crankshaft position sensor or the camshaft pos sensor, or Battery either that or something is hooked up wrong or a new part is not functioning I know some Porsche techs recommend against using VDO also something to do with having to replace same part over and over
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I feel your pain man I'm going through the same. Mine runs on right side fuel pump fine. It seems like from what you are saying that your left fuel pump is not running at all so it is either a dud or something has been hooked up wrong. Make sure u recheck the work. A Hose(s) or ground may have came lose, hose may have been hooked up incorrectly or may have leak in right side hose as u indicate. Don't forget there is a fuel check valve in the front of the engine as well that can cause similar issues. I think my issue is left fuel pump only since it will run almost normal with fuse 14 pulled. At this point sounds like process of elimination like with similar to mine recheck hoses replace right pump, replace check valve, replace MAF(s) in that order keep in mind I had these issues and Porsche dealer told me my car was fine then told me it was the MAF when it clearly wasn't other small indy shops couldn't figure it out either clueless techs
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Often times when you replace the left fuel pump and drive around a few days and then symptoms return. It's usually because somewhere a long the line of the install something was hooked up incorrectly. Or maybe the right pump finally gave out altogether. Given your symptoms It is generally 5 things it could be. Fuel Pump/Valve related, MAF related, TPS, Camshaft/sensor related, Coils.... 1st course of action should be making sure your right fuel pump is still functioning and before replacing make sure the left pump hoses are hooked up 100% correctly. As a matter of fact test your left fuel pump is functioning as well some aftermarket pumps have gave out 48 hours after installation.
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LOL well I told you it was the left fuel pump.. It was pretty easy to identify for me when reading your symptoms. But just keep in mind in time generally you want to replace the filter flange or at least clean the filter when you replace the left fuel pump because a dirty or clogged filter may have been an issue and can cause an issue with your new pump over time. And you will want to replace your right pump as well after a while because the fuel pressure is probably lower than normal or let's say not in sync with the newer pump...
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If you pulled fuse 14 and your vehicle died then your left/Driver side fuel pump is dead. I'm in the same boat. I use to have cut out on acceleration and stuttering problems all kinds of issues than read up on it and discovered my driver side fuel pump was dead after pulling fuse. Even Porsche dealer did not figure it out and told me it was the MAF and tried to charge me 2800 to fix! There is no telling how long I had been driving on 1 pump with the main pump either partially running or dead but I'd say it's been at least 6 months to a year. Plan to fix it next week. The thing that had me fooled was my PIG would drive fine for about an hour until the pump warmed up then it was start acting crazy upon accel cutting in and out and such so it can appear as If your pump is running correctly when it's not
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Fuel Pump?
ybe replied to spooltime's topic in 9PA, 9PA1 (Cayenne, Cayenne S, Cayenne Turbo, Cayenne Turbo S)
Usually the filter develops a leak or hairline crack that may not be visible. raw fuel begins to seeps through and that is where the fuel smell comes from. Every vehicle is different. Mine ran fine with fuel filter leak but fuel smell was really strong after drives when I park I could smell raw fuel towards the rear where the filter is. Depending on how bad the leak or crack is determines how well the car will run. From my experience when filter needs replacing the main driver side fuel pump will not be far behind. -
Fuel Pump?
ybe replied to spooltime's topic in 9PA, 9PA1 (Cayenne, Cayenne S, Cayenne Turbo, Cayenne Turbo S)
FYI If you did not replace your fuel filter when replacing both fuel pumps, then you will most likely encounter this problem again and the fuel smell will return. -
Fuel Pump?
ybe replied to spooltime's topic in 9PA, 9PA1 (Cayenne, Cayenne S, Cayenne Turbo, Cayenne Turbo S)
When I had a strong smell of gas it ended being the fuel filter. There was a strong smell of gas on the driver side towards the rear. -
Fuel Pump?
ybe replied to spooltime's topic in 9PA, 9PA1 (Cayenne, Cayenne S, Cayenne Turbo, Cayenne Turbo S)
When I had a strong smell of gas it ended being the fuel filter. There was a strong smell of gas on the driver side towards the rear.