Notice - There are less than 3 weeks left until our annual server lease is due for renewal - and we are currently at 90% of funds needed to renew.
Please donate to help keep this site running -- donate here.

Jump to content


Call for Donations - All new donations go towards our 2014-2015 operating expenses. Please consider an ANNUAL donation to help keep this site operating. Click here to Donate

Photo

going mad cayenne s misfire and chugging cyl 2,5,7


  • Please log in to reply
17 replies to this topic

#1 optimus1

optimus1

    Member

  • Members
  • 6 posts
  • From:uk
Reputation: 0
Neutral

Posted July 27, 2011 - 04:22 AM

hi guys, can any one help i have a 2005 cayenne s 4.5 V8 with 67k miles and full porsche history, the problem i am having is the car misfires and a chugging sound on idle naturally drowned when you accl. i have replaced all the spark plugs, all 8 coils and moved petrol injectors around also replaced inlet manifold gaskets. I also cleaned the two cam sensors with brake cleaner to no avail also checked head bolts in case they are loose no they are not still missing, i disconnected both exhaust systems still the same thinking the cats could be blocked no matter what i do fault code cylinder 2 misfire, cylinder 5 misfire, cylinder 7 misfire when the car is cold it will fire up on the key if allowed to warm up then re-start it will take time to fire up also when running tube of cyl 6 getting very hot much much hotter then the rest, what i cant work out is the connection between misfire and chugging sound almost like a locomotive yet i have no vacuum leaks or abnormal sounds coming from engine, i am totally lost your HELP would be very appreciated


  • 0

#2 mudman2

mudman2

    Contributing Member

  • Contributing Members
  • 1,018 posts
  • From:Bucks County PA USA (Ex - Pat)
Reputation: 28
Excellent

Posted July 27, 2011 - 09:31 AM

I presume your resetting the error messages ? Fuel Pumps, the high pressure system has to be up to pressure, would be my guess


  • 0

#3 optimus1

optimus1

    Member

  • Members
  • 6 posts
  • From:uk
Reputation: 0
Neutral

Posted July 27, 2011 - 09:45 AM

I presume your resetting the error messages ?

Fuel Pumps, the high pressure system has to be up to pressure, would be my guess

yes resetting all the time if fuel pressure then what about the chugging sound?? engine sounds as if a spark plug has been taken out whilst engine running very similer to that
  • 0

#4 Loren

Loren

    Porsche Nut

  • Admin
  • 28,455 posts
  • From:Roseville, CA
Reputation: 1,289
Outstanding

Posted July 27, 2011 - 09:48 AM

If it sounds that bad - it would be best to do a compression test on all cylinders.


  • 0

Loren

RennTech.org

PCA member since 1978

My Mods in the Registry


Has someone helped you with a good solution to your question(s)? If so, give them a reputation point by clicking the rep_up.png arrow at the bottom right corner of any post.


#5 optimus1

optimus1

    Member

  • Members
  • 6 posts
  • From:uk
Reputation: 0
Neutral

Posted July 27, 2011 - 01:43 PM

Thanks Loren thats next step . I took the plugs out today bearing in mind they are brand new with zero miles they had heavy carbon on them I was trying to check if the coils were giving spark cylinder 2 reddish colour spark not white as I expected however it was the same on 6 and 8 yet 6, 8 do not appear as trouble codes at the same time I was trying to work out why tube 6 of inlet was getting so hot I started engine without plug in cylinder 6 still getting hot how ?? When plug is out no fire in cylinder but did detect fait exhaust fumes and not raw fuel which should have been, I think valve issue?? Compression will tell hopefully what a night mere my autodata cd does not cover cayenne so have no data as to timimng chain removal, marks etc uk Porsche dealers not very helpfull either any ideas where I can obtain this on the net?? Thanks for assistance


  • 0

#6 optimus1

optimus1

    Member

  • Members
  • 6 posts
  • From:uk
Reputation: 0
Neutral

Posted July 27, 2011 - 01:55 PM

Sorry sorry sorry just read on this forum cylinder lay out what I call 6 is actually 7 I naturally assumed as other V8's bulkhead side on left of engine is 5 not 8 Porsche had to be different so number 7 tube is getting hot also misfire there and 5 what I thought was 8 also misfire Apollogise for that error


  • 0

#7 Loren

Loren

    Porsche Nut

  • Admin
  • 28,455 posts
  • From:Roseville, CA
Reputation: 1,289
Outstanding

Posted July 27, 2011 - 02:23 PM

Check the coil packs for crack and shorts too.


  • 0

Loren

RennTech.org

PCA member since 1978

My Mods in the Registry


Has someone helped you with a good solution to your question(s)? If so, give them a reputation point by clicking the rep_up.png arrow at the bottom right corner of any post.


#8 wvicary

wvicary

    Contributing Member

  • Contributing Members
  • 2,915 posts
  • From:Regina,Sk,Canada
Reputation: 81
Excellent

Posted July 27, 2011 - 04:03 PM

Did all these faults happen at once? I would start with the basics and verify the valve timing.


  • 0

#9 optimus1

optimus1

    Member

  • Members
  • 6 posts
  • From:uk
Reputation: 0
Neutral

Posted July 28, 2011 - 02:00 AM

Did all these faults happen at once? I would start with the basics and verify the valve timing.

ALL COILS ARE NEW BERU ONES, I AM IN NEED OF TIMMING DATA AND YES ALL THE PROBLEMS AT SAME TIME, I THINK THEY ARE ALL CONNECTED TO TUBE ON INLET GETTING HOT . I WILL LET YOU CHAPS KNOW WHEN I HAVE FINISHED COMPRESSION TEST THIS AM SURE WILL SHED MORE LIGHT THANKS GUYS
  • 0

#10 wvicary

wvicary

    Contributing Member

  • Contributing Members
  • 2,915 posts
  • From:Regina,Sk,Canada
Reputation: 81
Excellent

Posted July 28, 2011 - 06:52 PM

Let us know what you discover and please stop using all capital letters.... makes us think you're yelling.


  • 0

#11 optimus1

optimus1

    Member

  • Members
  • 6 posts
  • From:uk
Reputation: 0
Neutral

Posted August 06, 2011 - 08:16 AM

Sorry I wasn't shouting did not realize caps were on Amy way both heads off found on bank one two valves chipped and bank two eight valves chipped yes chipped how ??? Anybodies guess the heads at machine shop will see and advise no pistons were damaged though


  • 0

#12 wvicary

wvicary

    Contributing Member

  • Contributing Members
  • 2,915 posts
  • From:Regina,Sk,Canada
Reputation: 81
Excellent

Posted August 06, 2011 - 07:17 PM

Can you post any pics? I'm not sure what you mean by a chipped valve but I assume it has been damaged by the piston. I think you still have a valve timing issue which has caused these issues.


  • 0

#13 paulwu

paulwu

    Contributing Member

  • Contributing Members
  • 24 posts
Reputation: 0
Neutral

Posted September 14, 2012 - 10:33 PM

I have similar sympton on my04 cayenne-s; being many checking with days but hopless! Finally I got the car running after rev the engine 5k 3-4 times then suddenly it is back. I believe it is fuel issuel; either fuel pump or injectors stuck. will keep checking.


  • 0

#14 riz.hus

riz.hus

    Member

  • Members
  • 2 posts
  • From:London, UK
Reputation: 0
Neutral

Posted November 07, 2014 - 05:06 PM

Hi Guys, did you find the main cause?

 

I have a similar issue which occurs intermittently - and the car starts vibrating quite a bit, and shows misfire in cylinder 2.  Have a 2006 cayenne turbo s.  Any help would be very much appreciated.

 

thanks


Edited by riz.hus, November 07, 2014 - 05:06 PM.

  • 0

#15 WhisperBlade

WhisperBlade

    Contributing Member

  • Contributing Members
  • 66 posts
  • From:Canada
Reputation: 0
Neutral

Posted November 07, 2014 - 05:37 PM

Scored cylinder?  :huh:


  • 0

#16 deilenberger

deilenberger

    Contributing Member

  • Contributing Members
  • 416 posts
  • From:Sping Lake NJ USA
Reputation: 15
Good

Posted November 07, 2014 - 08:31 PM

Hi Guys, did you find the main cause?

 

I have a similar issue which occurs intermittently - and the car starts vibrating quite a bit, and shows misfire in cylinder 2.  Have a 2006 cayenne turbo s.  Any help would be very much appreciated.

 

thanks

 

Looks like you did a code readout. Chances are you have a coil failing. Which can show intermittently.

 

WhisperBlade - I know living in Canada you probably fear the scored cylinder #5 problem - but it's actually rather rare, and probably unknown in London UK where it rarely gets much below freezing. With these sort of issues - step by step diagnostics, starting with the simple stuff (like reading the codes - if a misfire is shown as he mentions I'd be moving coils around and see if the fault follows the coil) is really what should be done first - rather then yelling "FIRE" or "EBOLA" and causing panic.


Edited by deilenberger, November 07, 2014 - 08:32 PM.

  • 0
Don Eilenberger
Spring Lake, NJ
'06 Cayenne/S - Titanium
And a buncha BMWs..


#17 WhisperBlade

WhisperBlade

    Contributing Member

  • Contributing Members
  • 66 posts
  • From:Canada
Reputation: 0
Neutral

Posted November 08, 2014 - 01:14 AM

You're right. I have serious Scored Cylinder paranoia... best if I don't spread it around then!


Edited by WhisperBlade, November 08, 2014 - 01:14 AM.

  • 0

#18 riz.hus

riz.hus

    Member

  • Members
  • 2 posts
  • From:London, UK
Reputation: 0
Neutral

Posted November 12, 2014 - 06:23 AM

 

Hi Guys, did you find the main cause?

 

I have a similar issue which occurs intermittently - and the car starts vibrating quite a bit, and shows misfire in cylinder 2.  Have a 2006 cayenne turbo s.  Any help would be very much appreciated.

 

thanks

 

Looks like you did a code readout. Chances are you have a coil failing. Which can show intermittently.

 

WhisperBlade - I know living in Canada you probably fear the scored cylinder #5 problem - but it's actually rather rare, and probably unknown in London UK where it rarely gets much below freezing. With these sort of issues - step by step diagnostics, starting with the simple stuff (like reading the codes - if a misfire is shown as he mentions I'd be moving coils around and see if the fault follows the coil) is really what should be done first - rather then yelling "FIRE" or "EBOLA" and causing panic.

 

 

 

Thanks, yes I did a code readout (but cannot remember which code it was - but said cylinder 2 misfire..). 

 

I had cleared the misfire in cylinder 2 error code and the past few times I have driven it has not come back yet - but it had come a few times before that when I had cleared it.  Would you happen to have instructions on how I can get to the coil and move it to next cylinder?

 

 

These are not related to this post but not quite sure where to post this(if you know a post with these I can move the question there):

 

I am getting P0344 (camshaft position sensor bank 1) pretty much everytime I park and start up again. Also, when I reverse both the front and rear parking sensors show red bars, whereas front sensors work fine in drive.  Any idea what might be wrong with this - just trying to understand if something is wrong with the rear sensors why would the front ones also not work in reverse? Also, front passenger seat and rear seat heaters are not working - maybe the relay?  But not sure how to get to it.

 

Apologies for asking the obvious questions if I am, but I bought the car recently so not too familiar with things just yet.


  • 0




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users


The RennTech.org site is Member supported!   Make an ANNUAL donation to RennTech.org    Make an ANNUAL donation to RennTech.org