Trouble Starting After Filling Gas

[PrincessCayenne]

I've filled gas about 4 times in the last month and two of those times I've had trouble starting my 04 Cayenne S after I fill the gas. It sputters a bit and sounds really weak and starts after 3 - 4 trys...any idea what this could mean? Thanks!

[wvicary]

No check engine light? Could be a fault with the EVAP control solenoid but you need to have the code read out.

[PrincessCayenne]

Yes - there is a CEL - sorry, forgot to mention that. I'll have the codes read tomorrow

Thanks!

[SWFLHOMES]

I had the same problem. Mine ended up being a vapor line in the engine compartment that runs along the fuel rail on the drivers side (about $65) and 15 minutes to replace. I'll see if I have the receipt to get you the part number.

[PrincessCayenne]

Thanks!

I went to the shop today and they found a EVAP fault but they couldn't determine what kind it was because it was so sporadic (or something like that). They told me to just drive it and see if it happens again. I'll go fill gas again on the weekend and see what happens.

[SWFLHOMES]

I believe it is the purge control valve.

[wvicary]

EVAP control solenoid. Just replace the part. It runs along the drivers side of the engine starting at the throttle body and ending near the firewall area.

[mudman2]

there is a fairly cheap pipe with a check valve which runs down the the V of the engine. its a 90 minute job and i have detailed instruction if you decide to do it, its very straight forward.

[harmonyroadporsche]

I've run into exactly the same problem. If you could post the procedure for replacing the solenoid that would be fantastic!

[PrincessCayenne]

It happened again today after I filled gas so I'll take it back to the shop this week - Do you have the instructions posted somewhere on the forum? Why does it only happen after I fill gas?

Thanks!

[mudman2]

the reason this happens (my explanation) is that the fuel system is constantly presurised. The check valve maintains the pressure when you open the gas cap at the back until you close the system again, this is also why gas cap seals are important.

you will need to remove the throttle design cover

pull up it comes right off. then you will need to remove the 4 t 30 torx screws on the drivers side coil cover.

then that cover will pull up.

Use a large flat blade screw driver or a penny to remove the 1/4 twist locks that hold down the drivers side engine compartment cover (the big black one) there should be 4 1/4 ttwists

Then remove the rearblack panel, 1 1/4 twist in the center and 2 on the pass side of it. Remove the panel

the purge valve is in the fron of the engine between the head and the intake on the drivers side .

Looks like a black cylinder little bit bigger then a film canister with a hose on one end to the front and the back is a hard black plastic line that runs along the intake and comes up in the back and goes to a rubber hose on the fire wall.

Un plug the valve and push it off its bracket, undo the clamp with a pair of plairs and pull the hose off (sometimes you need gently grab the hose with the pliars and twist to loosen it up from the valve, you can damage the valve just not the hose.

In the rear you will need to do the same, the rear hose never comes off easy I think they glue it on, use you pliars to crush the plastic line where the hose is over it. once it is crushed enough it will come off. The line is pushed into 2-3 gold clips along the intake, it will pull right out of them, You also may need to unplug the injectors on the drivers side bank just to make it easier to route.

Really I promise you its a lot easier then my 2 page explanation shows .

Part number 948 110 202 01

[PrincessCayenne]

Awesome! Thanks so much!!

[Faceman]

I just had something very similar happen to mine. Did the above procedure solve your problem or was it something else like the fuel filter or pump? Mine sputters initially, smoothes out for a bit but then it wont proceed past 4000rpm. Ill have it checked out this weekend but its gonna nag me all nite. Argh!

[mudman2]

not the same, coils maybe

[Technoir]

Had the same problem and followed MUDMAN2 instructions to replace the valve. Problem is gone.

Thank you ALL.