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Joe - 04 Dec 2005 13:40 GMT

The Evaporative Emission Control System Leak code is back. Already
replaced the gas cap and cleared the code, but it came back after a
couple days. Did this twice now.

Any suggestions on where to look beyond the gas cap? TIA.

Joe
'03 Dakota 5.9 R/T CC
'93 Mustang 5.0 LX hatch with a few goodies

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Wrench007 - 05 Dec 2005 06:27 GMT

>The Evaporative Emission Control System Leak code is back. Already
>replaced the gas cap and cleared the code, but it came back after a
[quoted text clipped - 5 lines]
>'03 Dakota 5.9 R/T CC
>'93 Mustang 5.0 LX hatch with a few goodies

Is this the '03 Dakota 5.9 R/T CC?
Is the new cap aftermarket? Does the lip of the gas filler neck look
damaged or rusted?
Vapors are escaping...these vapors are routed through hoses, solenoid valve,
and a leak detection pump.
You can visually inspect the rubber vacuum hoses and plastic black lines
under the hood (from the fuel tank) and under the vehicle for cracks and wear,
also look at the Gas
tank, return fuel lines and filler tube for signs of leaking fuel.
You can have a smoke test performed at a shop, but with this code
usually a thorough visual inspection will find the fault --J

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Joe - 05 Dec 2005 11:38 GMT

>>The Evaporative Emission Control System Leak code is back. Already
>>replaced the gas cap and cleared the code, but it came back after a
[quoted text clipped - 6 lines]
>>'93 Mustang 5.0 LX hatch with a few goodies
> Is this the '03 Dakota 5.9 R/T CC?

Yes.

> Is the new cap aftermarket?

Brand new OEM cap from dealer.

> Does the lip of the gas filler neck
> look
> damaged or rusted?

Not at all. Looks perfect. I even wiped it clean with a clean shop
rag.

> Vapors are escaping...these vapors are routed through hoses, solenoid
> valve, and a leak detection pump.
[quoted text clipped - 3 lines]
> and wear, also look at the Gas
> tank, return fuel lines and filler tube for signs of leaking fuel.

Thanks, will do.

> You can have a smoke test performed at a shop, but with this code
> usually a thorough visual inspection will find the fault --J

This happened a while ago, and they did the smoke test and found the
bad cap. Replaced it, problem gone for months. Now it's back.
Replacing the cap with the new OEM unit from the dealer didn't help, so
it's either a bad cap (unlikely?) or something else. I will check the
hoses, etc.

Joe
'03 Dakota 5.9 R/T CC
'93 Mustang 5.0 LX hatch with a few goodies

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