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2006 Cayenne TT - Poor start and running after fill up

PKN
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PKN Member

PKN

Posted
Posted

I did find someone on the site who had a similar problem but no resolution. My car runs like a dream but the last two times I filled up, it would not start for a few seconds immediately after filling with gas. It starts after a few seconds cranking but not on all cylinders but clears up after reving for a couple of minutes at 1000 rpm or so. It feels like the motor is flooding but this only happens immediately after filling. I also got the CEL on later the same day though it also goes out after a few days of running. Any suggestions before I put the Durametric on tomorrow?

PKN

working4it Member

working4it

Posted
Posted

Pulling the codes from durametric Will help narrow it down. But the usual culprits for these symptoms are, check valve, vent line, fuel filter and lastly fuel pump. Any of these are DIY projects. Lots of information posted on forum. I will look for some diagrams/part #'s

working4it Member

working4it

Posted
Posted

I would start with Check Valve and Vent line this seems to be the most common. I have attached the diagram...

Vent line part # 948-110-202-01

Check Valve Part# 948-107-219-50

If you cant start your car or it runs for a few seconds quits and you cant start it most likely its the fuel pump.

check valve.pdf

PKN Member

PKN

Posted
  • Author
Posted

Many thanks guys. I put the Durametric on and had so many error codes (none of which were currently "active") that I cancelled them all until the next fill up. The vent line is all new as I replaced it when I did the coolant pipes but the valve looks to be favorite and easy to get to. I will see if it can be rinsed through with carburetor cleaner before I replace it though just in case it is just gummed up. I will report back when I get a result (or not)

PKN

bigbuzuki Member

bigbuzuki

Posted
Posted

The fuel tank vent line comes with the check valve as one assembly. Part # 948-110-202-01.

That's the one that was causing the poor start on my CTT.

  • 3 years later...
Zuffenhausen955 Member

Zuffenhausen955

Posted
Posted

I have the same problem too. However, I did notice if I immediately cap the tank off after filling-up......it starts right up. I have been getting codes of:

 

P0442

P0455

P0441

 

Still the vent line?

  • Admin
Loren Member

Loren

Posted
  • Admin
Posted

I have the same problem too. However, I did notice if I immediately cap the tank off after filling-up......it starts right up. I have been getting codes of:

 

P0442

P0455

P0441

 

Still the vent line?

 

or the seal on the gas cap.

Zuffenhausen955 Member

Zuffenhausen955

Posted
Posted

 

I have the same problem too. However, I did notice if I immediately cap the tank off after filling-up......it starts right up. I have been getting codes of:

 

P0442

P0455

P0441

 

Still the vent line?

 

or the seal on the gas cap.

 

Gas cap replaced recently. 

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