Automotive Forums

I am having problems with the engine light coming on.  The dealership has so far replaced what they called a defective fuel cap.  The light came on again about 2 weeks later.  This time I was on a trip and suddenly started smelling gas fumes really strong.  The dealership this time replaced a fuel line hose that they said had a hole in it and also replaced a defective charcoal canister.  I picked the car up on Friday afternoon.  The light was not on.  On Sunday, the light came back on again.  I am totally frustrated.
The dealership does not seem to be able to pinpoint the problem and so far I have paid out between 4 & 5 hundred dollars.  Has anyone else had this problem with their 2004 Toyota Avalon or any model of Toyota Avalon?  

If the codes coming up is for the EVAP system , which it promaly is since they changed the fuel cap,the pest way to find the problem is with a "smoke" test,that way the mechanic can see where the fuel smell is coming from.$500.00 for a fuel cap and canister? Glad I don't have to deal with "dealers" find a good local independent shop in your area.  

Thank you for responding to my question.  You seemed very knowledgeable on cars.  I was told by the dealership in the beginning that the problem was in the EVAP system.  On Thursday they ordered a "smoke machine" and this morning I took my car in for this test.  They seem confident this machine will locate the problem.  I am hoping this will be resolved soon and I will share the final outcome in hopes it may help others down the road.

Thanks again for your response!  These forums are wonderful!