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low37

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About low37

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  • From
    montreal, quebec, canada
  • Porsche Club
    No
  • Present cars
    2004 porsche cayenne turbo
    2008 infiniti g37
    2004 audi s4
  1. thanks for your help guys when you removed your heads off, did you noticed any signs of excessive carbon build up? where can i download the workshop manual? Thanks again
  2. Good morning just got the car back from local shop got it scanned with durametric, got so many codes i almost cried... p0509 : idle air control system rpm p2187 : system at idle bank 1 p2189 : system at idle bank 2 p0011 : a camshaft position-timing over-advance or system performance bank 1 p0021 : a camshaft position-timing over-advance or system performance bank 2 p0441 : evaporative emission system incorrect purge flow p0300 : random/multiple cylinder misfire detected p0303 : cylinder 3 misfire detected p0302 : cylinder 2 misfire detected p0301 : cylinder 1 misfire detected p0304 : cylinder 4 misfire detected so my mechanic said it might me due to a timing chain problem..making the camshaft skip a tooth resulting in timing advance causing misfire on 4 cylinder (on the same side of the engine) i erased all the codes and only 2 misfire came back.. cylinder 2 & 6.. drove the car back home (5 min away) and performed a compression test cylinder 2 showed no compression at all, other cylinders were low on compression but i felt that my battery was low so may be the test was not accurate ( i hope so) next thing i did was a leak down test on cylinder 2.. i could hear the air rushing threw the exhaust.. this tells me i have a bad exhaust valve, or spring valve or some dirt or carbon build up between the valve and the valve seat... so now my question is : can i remove heads with the engine in place? will i need to send both engine heads to machine shop for repair ? what are the chances i would need new rings OR timing chain done... mechanic said it could cost up to 1000$ per head to do exhaust valves only... cant immagine how much all of this is going to cost.. 125$ each exhaust valve, 16 total thanks for your help!
  3. Hi guys! this is my first post! let's see if anyone can help me out with this problem. i have a 2004 porsche cayenne turbo with 120 000 miles. took it for a high speed run last night (130+ mph). when i got home i noticed a very rough idle and the car was shaking/vibrating. i can also hear a noise from the engine similar to an exhaust leak. the check engine light was already on prior to that ride (codes are : p2187, p2189, p0011, p0441) no new codes so i assume there is no missfires? feels like it runs on 7 cylinders.. coils and spark plugs have been replaced recently can a high speed run causes a blown spark plug/coil ? i still have boost so i assume it is not a boost/vaccum leak? can it be a stuck valve, bad spring valve all of a sudden? do i need a compression test or how can i check if one cylinder is missfiring? (i speak french sorry for grammar) thanks for your help! jp
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