P0344,P0300,P0303,P0304

[thor1974]

Hi

I have a Porsche Cayenne Turbo. I had a Cylinderhead damaged and changed the Gasket include Chain. The Engine is now rough idel and miss firing. I read that the Code P0344 can cause the miss fire. The Cam Sensor is new. did anyone had this kind of problems too after chaging the headgasket???

 

Please let me know

 

Thanks

[angusc]

Are you sure you got the engine timing spot on?

Sent from my SM-G935F using Tapatalk

[thor1974]

yes the engine was running smooth and I set the timing back how is was.

[lewisweller]

7 hours ago, thor1974 said:

yes the engine was running smooth and I set the timing back how is was.

This is bank 1 correct? Assuming you did the gasket change correct? no burnt exhaust valves, head not warped, all tolerances in spec .......would be great to have a write up on that especially the setting of the timing please. (I've had both head gasket replaced engine out job on my 06 ctt done by an indy)

 

I suggest you remove the valve cover and check the bank 1 cam shaft pick up tabs are not bent or damaged? P0344 relates to cam position and P0300 0303 0304 are multiple misfire codes and cylinder 3 and 4 misfire respectfully.

The other possibility is timing is set wrong or you have some vacuum leaks(much less likely but stranger things have happened on the cayenne), oil in the spark plugs (gaskets didn't seal unlikely as p0344 doesn't relate) failing coils or the coil have damaged wiring harness (less likely or a very unfortunate coincidence and P0344 doesn't relate either) intake manifold leaks to specific cylinders and or injector oring seal leaks (again unlikely). 

I would go with the pick up tabs bent if your confident the other possibilities won't be the cause. Easily bent when you lift on and off the valve cover. 

See below same cause but different code for cam shaft position different to crank shaft position. 

 

[thor1974]

today I checked first the electric. I have 12Volt on the Sensor. very good ground and 5 Volt goes back to the ECM. tomorrow I will look after the Caps. I will keep you informed what I found out. But I have a new message in the Cluster from the Dashboard it showed now "oil level monitoring failure and PSM failure" and idea what that can be? The Oil level sensor in the oilpan is new.

[thor1974]

today I check the camshaft pick up taps and the little pin was bend. I bend it back and will check now the Timing again. had someone a diagram for the timing marks?

[lewisweller]

2 minutes ago, thor1974 said:

today I check the camshaft pick up taps and the little pin was bend. I bend it back and will check now the Timing again. had someone a diagram for the timing marks?

Another one with bent tabs this is turning into common occurrence. 

Let us know what the outcome is, anymore fault codes and what's the running condition now?

Thomas your reading this for sure! 

[thor1974]

lewisweller do you have a diagram for the timing marks?

[lewisweller]

Just now, thor1974 said:

lewisweller do you have a diagram for the timing marks?

Sorry I don't. Maybe Loren can help? 

[thor1974]

thanks will send him a message

[ekstroemtj]

37 minutes ago, lewisweller said:

Another one with bent tabs this is turning into common occurrence. 

Let us know what the outcome is, anymore fault codes and what's the running condition now?

Thomas your reading this for sure! 

 

 

Yes i am reading this.

 

Many times already it has been discussed in the forum about the importance to take care about these cam shaft tabs when working on the valve cover.

 

would like to ask what this tabs are doing? Would a problem causing constant    rough running? Misfires? In all rpm range? In some specific rpm range?

if the flap would be broken, how to replace / repair?

[thor1974]

if the tabs are broke then you have misfire and rough idle but if it broke off then is the engine stalling.

[ekstroemtj]

Thank you.

Ok if its like this i would rule it out in my case. The engine is just not running smooth at some rpm range but the idle is actually good.

 

[thor1974]

and a new day starts. I checked the timing today and saw that both cams are 1 tooth out.

[thor1974]

after checking the timing again and blocking the Cranskshaft I saw that the timing was off from the exhaust Camshaft Bank 1 after I set the timing new and bend the tap back in position. engine runs smooth

[ekstroemtj]

Congrats that you could solve this. Great!

how you set the timing? This is described always as a very big and difficult job.

[thor1974]

thanks to loren he send me a description. to set the cam timing is very easy and goes  fast

[ekstroemtj]

Great. Good to know