2005 Cayenne stalling

[lnnguyen01]

Hi hoping for some help for my 2005 Cayenne 3.0 131K miles!

 

Last night after getting out of movie my Cayenne started but just as I got from parking lot onto road it sputtered and died.  It would restart and would go 10-15 feet and died multiple times.  Same thing happened this morning.

 

Thinking it may be the fuel pump (through this forum), I tried pulling #14 fuse and still same problem.  If I keep it in park, it would idle a bit but sputter, then would idle a bit longer if I gave a little gas pedal but still would sputter and die after 15-20 seconds.

 

I put fuse #14 back and pulled #13 fuse and Cayenne will not start.  I got it towed home into driveway.

 

Using my code reader, Cayenne is not throwing any codes.  Fuel filter replaced 3 years ago at 90K miles.

 

Any input appreciated!

Thanks

 

[JFP in PA]

You need to start by running a fuel pressure and volume delivery test.

[lnnguyen01]

Thank you for reply!

 

I don't have the equipment to do fuel pressure/volume delivery test.  I replaced fuel filter myself 3 yrs ago and wasn't too bad of a job.  I'm thinking of replacing both fuel pumps and fuel filter myself now and if that doesn't fix take it to mechanic.

 

The fuel tank is just above 1/2 full.  Could that be the reason why pulling fuse #14 made no effect?  If so, should I fill up the tank and try it again?

 

Thanks again!

[JFP in PA]

What you should be doing is the fuel system test I suggested.  If you cannot do them yourself, take it to someone that can.  Aimlessly swapping out expensive parts is only going to make your wallet easier to sit on.

[lnnguyen01]

Hi thanks.  I got fuel pressure test kit from AutoZone.  I can't find the Schrader valve to hook up to.  Can you help me locate the valve in the enclosed picture of the fuel rail?

Thanks!

[lnnguyen01]

Is one of these in picture the Schrader valve to test fuel pressure?

Thanks

[JFP in PA]

The fuel pressure test port is under the engine cover (which needs to be removed). step.  Once you have the cover off, the "fuel gallery" is the y-shaped tube (carries the fuel around the injectors) that runs on both sides on the intake manifold. It's the only silver metal tube there. On the very front ends of this y-tube, you will see black twist-off covers (similar to those found on a tire valve stem). Remove these and you can access the relief valves (they look like the inside of a valve stem). off, the "fuel gallery" is the y-shaped tube (carries the fuel around the injectors) that runs on both sides on the intake manifold. It's the only silver metal tube there. On the very front ends of this y-tube, you will see black twist-off covers (similar to those found on a tire valve stem). Remove these and you can access the relief valves (they look like the inside of a valve stem).

 

The caps in your second picture are the AC lines.

[lnnguyen01]

I suspected those were AC line.  I found the valve!  Bottom right in enclosed pictures (the second pic shows cover off).  Is there more than one valve?

Thanks again!

 

[JFP in PA]

No.

[lnnguyen01]

Just an update.  I wasted probably a day total trying to test the fuel pressure.  That port needed an adapter to fit the Autozone kit.  Then the Cayenne wouldn't stay on running long enough to check the pressure anyways.

 

Decide to order and replace both left and right fuel pumps along with fuel filter on the left side.  As most posters have mentioned previously, a mess of lines in there but not all that hard a job.  Just be patient that's all.

 

Cayenne running great now.

Thanks!

 

Ordered from Sonnen Porsche as below.  Only need one of the Angled Pipe Flange though.

955-620-931-01 Fuel Pump Left Fuel $289.70 1 $289.70     955-620-911-01 Angled Pipe Flange W $9.14 2 $18.28     955-201-133-01 Fuel Pump Assembly Gasket $9.64 2 $19.28     955-620-421-00 Fuel Pump Assembly Flange $93.83 1 $93.83     955-620-932-01 Fuel Pump Assembly, RIGHT $289.70 1 $289.70