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2004 CTT Changed boost pipe seals because they were leaking Changed diverter valves because they were leaking New filters plugs & coils but I’m getting behavior like multiple misfires and Durametric codes P2236, 2238, 2225, 2227 Time for O2 sensors?
Tyler is that you!?!
GSpence2 replied to GMKF's topic in 9PA, 9PA1 (Cayenne, Cayenne S, Cayenne Turbo, Cayenne Turbo S)Howdy
As with nearly all Cayenne issues I think a good starting point would be checking and ensuring the battery/batteries and charging system are in good health and operating correctly I’ve been experiencing some weird drivability issues as well and the root cause is pointing to a possible/probable electrical system issue
GSpence2 replied to Almamo's topic in 9PA, 9PA1 (Cayenne, Cayenne S, Cayenne Turbo, Cayenne Turbo S)Need to get it to a Porsche dealer or specialist who can pull the DTCs My guess is a failing transfer case/transverse lock module and solenoid
So I did some more data-logging today during a portion of my morning commute. Mostly low speed (below 25MPH) stop and go but a couple of places where I could really go fast (30-35MPH). If I am understanding and reading this data correctly my check engine light codes P2227 & P2225 are being caused by a vacuum and/or boost leak? Take a look and pay attention to time slots 12:59 & 16:57. Something weird happens both times when it feels like the timing is all of a sudden thrown off, and the truck hesitates, stumbles, loses power, and then snap crackle pops through the exhaust like a cheap rice rocket with a fart pipe. And each time this is with a steady easy throttle no mashing. Untitled.mp4
I realized after the fact some of you may not have a .avi player so I reformatted the data-logging file as a .mp4 Untitled5.mp4
So I pulled some live data today and am going through it now. One thing I'm not certain about that caught my attention is the correlation of ambient air pressure drop as intake air pressure rises; I thought this would actually be the inverse of what's being reported? Have a look. Untitled 5.avi
So I tested the battery today and at rest no ignition I'm getting 12.6 volts. With the engine running I'm getting 13.85 volts. Battery is not even a year old yet. Okay no rodents, ECU check sums are checking out okay, BUT - I'm losing boost, and the timing is being retarded in a big way right when the turbos should start to spool hard about 26-2700 RPMs. Spool up to .3-.4 bar and then le poop! Full dump. Power loss, hesitation, stumble, no CEL - repeat. Hmm...curious... I'll try to capture some live data and post it. I'll try cleaning my MAFs too. I ran some Techron through a couple of weeks ago - didn't really need it but it was a gift so...
hmm, both sensors failing at the same time? rut ro... ECU crapping out? rodents in the engine harness... let's have a look
whoopsie! Sorry about that Boss. 2004 Cayenne Turbo, slightly not stock...
Boost leak? Vacuum leak? Clogged cats? Any help or suggestions would be appreciated.
I just recently replaced my hood latch. It involves take the front bumper cover off to get at the latch and microswitch
In normal it's mildly stiff body roll is easy to control when pushing it road imperfections are slightly damped In comfort it wallows around and body roll is noticeable when you push it and road imperfections are dampened more than in normal In sport it's very stiff minimal body roll and you feel every imperfection in the road