2010 Cayenne S Idile Rough and found fault codes in Durametric

[ltaudio]

It idiles rough some times, and then when you get to the next stop sign the problem seems to go away, Ran fine once moving, just stumbing below 1000rpm. I pulled the computer fuse for 20 seconds and also tried testing the fuel pumps. Runs fine now however durametric has given me the following codes.

0424 - Upper Limit Value Exceeded

3002 - No signal/communication

5113 - implausable signal

5313 - implausable signal

3226 - no signal/communication

[Doohan]

Try to clean the MAF sensors and the connectors

[Loren]

I would start by cleaning the throttle body also.

If it is still rough then the coil packs should each be tested.

[ltaudio]

coil packs are new and am going to get some cleaning spray and a security hex head tonight, only seems to do it when its very warm outside. I only have the cayenne since March.

[ltaudio]

ok after cleaning the maf's nothing changed, so I then plugged in durametric and read cyl missfires I got 1 on cyl one and 20 on cyl 3

So i switched coil pack 2>3 3>2. and checked again and still missfire on cyl 3. Then I ripped the intake off and fuel rail and swapped injector 1>2 2>1 and 3>4 and 4>3 and I am still getting misfire on cyl 3. Any ideas the plug in cyl 3 dosen't look the worst but it does look a bit like it has burnt lean.

[ltaudio]

ok here is the error log I am getting

[ltaudio]

Any ideas, anyone?

[Ahsai]

Have you tried swapping the plugs or putting in a new plug in cyl 3? Do you have more details of the error codes?

[ltaudio]

Found another issue, a vacuum line that has no place to go, here it is see in the passenger corner above the rear most portion of the intake. Two of the three lines have somewhere to go, but I cannot seem to find where the third goes off the T fitting.

[ltaudio]

Tracing this line the bottom hose goes down to the valve cover and the piece going to the right and goes to another tee one of which goes into a hose to go to the back of the engine bay and that other goes to the little solinoid on the back of the intake. Just cant figure out where the 3rd in the picture goes. there is nothing obvious off anywhere.

[ltaudio]

Got some Durametrics readings if any one can help I would be very appreciative as this idle issue is getting old quick.

[WhisperBlade]

How is your engine oil consumption?

 

This is a common symptom in 04 - 05 of a scored cylinder. Hope yours is ok!

Edited July 10, 2014 by WhisperBlade

[ltaudio]

About a quart every month or so.

[WhisperBlade]

That engine oil use is quite excessive. It may be worthwhile having someone investigate the health of the engine in general. 

Edited July 14, 2014 by WhisperBlade