Loose Gas cap CEL - Subaru WRX Forum
 
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#1 Old 08-13-2012, 04:26 PM
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Loose Gas cap CEL

OK
So I've been having the loose gas cap code coming up so I replaced the gas cap, reset ECU and it still coming back on as small leak/ loose gas cap?

Anyone got any ideas?

Cobb Accessport Stage 2.
JDM ej205 swap.

Hakuna Matata.

Chuck.
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#2 Old 08-13-2012, 11:55 PM
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I might be a legit evaporative emissions leak. Those are a pain to find. Put your car up on a lift and check all your gas lines to make sure nothing cracked or rusted thru. A pinhole leak usually from rust is what typically causes them and are mostly more of an emissions concern. What was the actual code?

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#3 Old 08-14-2012, 10:59 AM
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Could check the relay and tubing where the system meets the manifold.

Just behind and under the alternator, the evap vapors (from the third gas line down) go thru an electric switch.
Check the connection and the two vapor pipes are ok.
Vapor then goes to the pressure operated valve (passenger side of the alternator) should have two large vapor tubes, one from the electric valve and one connects to the intake tract.
The small third tube goes to the alloy manifold, make sure it's not blocked/cracked.
You could also take the three way valve off and give it the suck/blow test (nohomo) see it works with pressure change.
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#4 Old 08-14-2012, 12:40 PM
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Nice info stealth! Rep'd

Kevin.
Cobb ap stage 2 ots, catless uppipe, catless turboback, Cobb Sf intake.
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#5 Old 08-14-2012, 04:28 PM
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So I think I found the culprit.

Photobucket

This was under the left side of the alternator. Guess it got disconnected somehow when messing around with the engine.



Thanks for the input guys.

Cobb Accessport Stage 2.
JDM ej205 swap.

Hakuna Matata.

Chuck.
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#6 Old 08-14-2012, 10:37 PM
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Stealth if I could rep you twice I would. Ha ha. I'm impressed. Would have expected an answer out of Keith, Paul or scott for sure. Nice work man.

Kevin.
Cobb ap stage 2 ots, catless uppipe, catless turboback, Cobb Sf intake.
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