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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
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!
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