04 Cayenne Turbo Started to Sputter

[mojoracerx]

Hello,

Cayenne started sputtering this morning. I have a feeling that it is the coils. It is acting like it cannot get enough power, and the engine is rough idling. This is the 2nd time that I would have to replace a coil. I do not have a durametric, and I am worried about driving it the 40 plus miles to my nearest Porsche Dealership. (1) Is there anyone here that has a DIY guide to changing these things out? (2) How can I tell which coil is bad? (3) What are the coil part numbers so I can order them? Any help would be appreciated. Fuel pumps were changed out about 1000 miles ago. I will try changing coils, and diagnose further after that. Car starts fine, Drives, however I have a huge lack of power.

Thanks,

Jon

[wvicary]

Do not operate the vehicle if the check engine light is flashing. It's all a guessing game without access to fault codes.

[mojoracerx]

No engine lights are flashing, and I will not operate vehicle at all. I am trying to order parts to do it myself. Thanks for the help.

Jon

[Loren]

All the more reason to get the fault codes and then order the right parts.

[wvicary]

If it was a misfire, a fault code and flashing check engine light would occur often in a few seconds. It's recommend to replace all of the coils at the same time with the most updated part number.

I would verify that there isn't a fault with the fuel pump install. I have seen more then a few times the internal piping in the tank come adrift after pump replacement.

[SA321]

check if your pumps are working. search for the thread. it is possible to diagnose by taking out fuses for each pump

[mojoracerx]

No CEL, hooked up OBDII and no codes. Drove down the street, and still sluggish. When idling, It smells like it is running very rich. Still no codes, maddening!! Should I just replace coils? Plugs are less than 7 months old.

[Loren]

You will likely need Durametric, Porsche PST2, or PIWIS tester to see pending fault codes.

[hahnmgh63]

What about something as simple as a boost leak? Intercooler hose or intake hose to the throttle body Y pipe?

[mojoracerx]

Finally!! CEL came on, and immediately diagnosed with OBDII. Code reads as follows: P0300 Random/multiple cylinder misfire detected. P0302 Cylinder 2 misfire detected. I finally started car today, and CEL immediately came on. Shut it down, and instantly diagnosed with OBDII. So, based on the codes, should I replace Cylinder 2 Coil? I will also replace plugs while I am at it. Any further guidance from renntech members would be greatly appreciated.

Thanks,

Jon

[Loren]

Although a coil pack is likely it is best to move the coil pack to another cylinder and see if the fault follows the coil pack.

If not, then do the same with the spark plug.

[mojoracerx]

Thanks Loren, I will try that.

[wvicary]

If you're going through the agro of changing the spark plugs also why not update all of the coils? I would also check with your local OPC and see if it's covered under warranty.

[mojoracerx]

Thanks guys. I will change all coils and plugs, and update status. It should be done by the end of this week. Thanks for all of the great advice. Thanks Loren.

Jon

[mojoracerx]

Finally changed coils and plugs last night. Wow!! What a difference in performance! Thanks guys for all the expert advice. I truly appreciate it.

Jon

[996flt6]

Sorry for hijacking this thread but my wife's 06 cayenne s had the coils/sparks replaced and the 2 fuel pumps. The car still hesitates/sputters when cold but better when warmed up. Car has 96k miles and there no cel's and it's been doing this for last 3 months. Any ideas? I'm at a loss. Mike

[Pkcayenne]

Hi I have a similar issue I replaced the plugs and one coil which threw an erro for two weeks the cayenne was running great now no power pulling away from lights I did get error for random misfires then two different misfires in cylinders cleared the errors still runs bad undriveable should I replace the coils giving the errors even if the error hasn't returned.    Took the car out this morning ran fine as soon as it heated up it started to cough and sputter on acceleration any ideas ?

[lewisweller]

17 hours ago, Pkcayenne said:

Hi I have a similar issue I replaced the plugs and one coil which threw an erro for two weeks the cayenne was running great now no power pulling away from lights I did get error for random misfires then two different misfires in cylinders cleared the errors still runs bad undriveable should I replace the coils giving the errors even if the error hasn't returned.    Took the car out this morning ran fine as soon as it heated up it started to cough and sputter on acceleration any ideas ?

Assuming you have check for codes and not found any then why not pull the coils (and plugs) and look for cracks and plug condition?

Heating up then having issues also can be a sensor o2, temp etc or actuator like the n75 or change over valve, but more unlikely. I would focus and eliminate the coils and spark plugs first. 

[Pkcayenne]

Ok will check the coils as still no errors 

[Pkcayenne]

Hi was the coils all cracked and bad fuel pump left side will be replacing the left removed fuse to run off secondary for now 

[lewisweller]

2 hours ago, Pkcayenne said:

Hi was the coils all cracked and bad fuel pump left side will be replacing the left removed fuse to run off secondary for now 

Ah simple fixes, some of us dream for these. ..........good for you mate enjoy. 

[Pkcayenne]

Cheers Lewis fuel pump next and now both front windows the door window cable as snapped, there is always something