Hi,

My Cayenne Turbo 2005 was overheating. Decided to replaced the thermostat, since no visible leaks were observed and also decided to give a proper tune-up

Changed the thermostat, gaskets, some cracked vent lines, all 8 spark plugs with new coils, and the annoying oil level sender...

When everything was set, I tried to fire-up the engine and has a rapid-cranking but won't start. The rev gauge moves to near 800 RPMs but nothing... Check the fuel rail nozzle and had pressurized gas or petrol (whatever want to call it)...

I put the Durametric tool and gave me all the Ignition Coil Codes (P0351, P0352, P0353, P0354, P0355, P0356, P0357, and P0358 Ignition Coil No signal/communication). Funny thing is that I clear these codes, the Cayenne starts and runs for 3 to 5 seconds and dies and the 8 faults returns. Reset, dies, faults.

Check all fuses and are alright. Battery was fully charged, drained, and re-charged. Perform the alarm-key close-open for the immobilization thing but nothing.

I checked all connections that I removed and were found connected properly. Disconnected the battery for several minutes and the same: dies and 8 faults.

Ran out of options...

Thanks in advance.

 

Has to be something simple that affects all 8 coils. Did You have to move any electrical harnesses around? Maybe some ground wire is not connected?

 

I'll re-check the connections, then...

 

Did you use Bosch or Beru coils or some off brand from China?

 

Good point, maybe check with old coils.

 

The other thing that could cause misfires on all cylinders and not just one bank is the crankshaft position sensor. We're you near the wires or sensor for that. I don't even know where it is on the Cayenne.

 

Rev counter needle moves when starting as stated above so not crank position sensor this time.

 

Eilenberger's Law of Troubleshooting: "Look where you last worked"... IMHO - something's up with the ignition system. Right coils? Right plugs? As for why it starts for 5 seconds then shuts off - the ECU shuts off fuel to any misfiring cylinder to keep from flooding the cylinder.

 

Were all bought from an US supplier... I'll check that... But all 8?

I'll check anyways...

 

I checked all the connections about 15 minutes ago (2:20p EST)... All connections worked with, were in place and properly connected. The ground at the base of the torsion mount was in place and tighten....

 

A US supplier like Amazon or a US supplier like FCP Euro or Pelican Parts or Suncoast?

 

These were the new ones...

 

Return those and get proper parts.

https://www.e46fanatics.com/threads/...-coils.462032/

https://maxima.org/forums/dealership...ff-artist.html

 

 

But Petza914, the name sounds German! They must be good!

More great reviews of Hamburg-Technic:

https://rennlist.com/forums/993-foru...g-technic.html
https://www.bimmerfest.com/forums/sh....php?t=1030617

Yeah. And if you bought 20 then you would have 20 bad coil packs.