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Hello,

I'm getting some misfires on 3 and 5. Starters seem fine so I've narrowed it down to coil packs. Does anyone know if there's a guide on how to change them? Is this something that can be undertaken by an amateur?

Thanks!

Chris.

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    You can remove these ads by becoming a Contributing Member.

It would be helpful to know year and model.. the engines are different (V6 vs V8 vs V8-Turbo)..

And if you're a skilled and patient amateur with the right tools - sure, not much to it really.. at least on the V8's.

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Check with your local dealer as these might be covered by a recall on the V8.

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Hi,

Should I replace all 8? Or just the ones causing misfires?

Thanks!

Read page 2 of the TSB - it depends on the part number of what is on your car.

TSB 16/07 2820 Bar Ignition Modules on V8 engine (16/07) -- dated Jan 22, 2009

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Local dealer says there is no recall; only if vehicle is exhibiting symptoms due to coil pack failure and CELnis on. They double the original coverage, so my 103k mi CTT is no "eligible". SA was a ***** too. Gotta love PPlace Porsche.

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Maybe you should print the TSB and show it to them... :huh:

Where can I find the TSB?

All TSBs are available for Contributing Membranes to view.

How to become a Contributing Member

Got it, became a contributing member. I did a DIY for 40K service, plugs, oil, cabin filter, air filter, pads, brake fluid (ATE 200), but never thought to check the coil packs, anyway car now has a code, pulled the code and it is a:

P0300 Random Misfire detected (no other codes shown)

Do you guys think this is a plug problem or the coil packs. The Engine light didn't come on until after the service. I know the plugs were changed properly because I did them twice (the first time Oriely's accidently gave me the wrong plugs first - the V6 ones). The misfire was prevelant with those but after even with the double headed bosch's I can still detect a slightly rough idle (although 10 times better then the wrong plugs).

May require a trip to the stealership.... what are your thoughts. I am the second owner 2006, with 43K. I read about the TSB. Could I call the dealer and try to see if they will cover.

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Best to read the fault codes and see exactly which cylinders are affected.

Then you can swap plugs and coil packs (separately) to determine the exact cause of the problem(s).

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Best to read the fault codes and see exactly which cylinders are affected.

Then you can swap plugs and coil packs (separately) to determine the exact cause of the problem(s).

Sorry for the newbie question but how do I read the specific fault codes. The cayenne is a winter car for me, summer is a nissan GTR that I track, tune etc as such very comfortable with the electronics in the Nissan, but the Cayenne is new to me. Do you guys recommend a reader.

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If you plan on keeping the Cayenne then I recommend that you invest in the Durametric software/cable. It reads Porsche specific codes as well as performing some special test functions that only dealers/shops with leased Porsche testers can do.

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Best to read the fault codes and see exactly which cylinders are affected.

Then you can swap plugs and coil packs (separately) to determine the exact cause of the problem(s).

Is this the correct tool

http://www.durametric.com/buyus.aspx

I am assuming the enthusiast kit will do (will this allow me to clear the service in xxxx miles lights also?). Also, I went back to Orielly's and talked with a kid who new more then the other guy about the ODB reader and he said the best thing to do was to clear all the codes from the wrong plugs which they gave me initially (the v6 plugs vs the dual spark v8 turbo plugs) as basically every cylinder had a problem, then drive down the street and see what if any new codes the new plugs threw. The car runs like 90% better but was still idling a bit rough. After clearing the codes drove for a few miles then turned off and turned back on and check engine light went back on. This time read the codes and it was only two codes which seems to indicate that it is isolated to 1 cylinder:

P0302 Cylinder 2 misfire

P0342 ignition coil B

Now I am assuming the ingition coil B relates to cylinder 2 (are the coils arranged in ABCDE.... sequence). The kid at the store said if I used the wrong plugs and the coil pack was close to going it could have put the "nail in the coffin" for that one. As such based on the above should I order a full set of coil packs or just the coil B? Also is coil B the one for cylinder 2? Thanks, sorry about all the silly questions but just starting out servicing this car ......

Edited by sjj31a

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Yes, that is the kit.

The Enthusiast kit and Pro kit are the same - except the the Enthusiast kit has up to 3 (VINs) cars and the Pro kit is an unlimited number of VINs.

Most private owners choose the Enthusiast kit.

P0302 Cylinder 2 Misfire Detected

This is likely where your problem is. Check the spark plug and coil pack on cylinder 2.

P0342 Camshaft Position Sensor, Bank 1 – Below Limit

Fix the misfire then clear the codes and re-test.

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In the past I would only replace the affected cylinder coil and it always came back to haunt me as the others failed shortly down the road. I now always replace them in a complete set with the newest part number.

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In the past I would only replace the affected cylinder coil and it always came back to haunt me as the others failed shortly down the road. I now always replace them in a complete set with the newest part number.

Yeah my thoughts are to do 1 and figure out if it is an 04+ part number, if it is then the remainder will be covered under the 100K warranty extension tsb. If not I will do all 8. Is everyone using the Beru replacements.

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The latest is a .09 revision part. I got all 8 from Hennessy Porsche for around $320 a few weeks back.

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I just did this service...  One thing that I figured out is to have a good spark plug socket, especially on Cylinder #4. It is hard to get to, even with everything out of the way.

 

Newport Porsche charges $1100 to change all plugs and coils... I understand why.... What a pain in the butt on a Turbo S.

 

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I've got a Turbo S and it really isn't any different than all the other V8 Cayennes. Just pull both plastic valve/coil pack covers and remove the passenger side Torque mount (a perfect time to check the Torque mount bushings and replace the mount if needed, over 50~60K and it will be needed).

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