Smog help!!!

[240trooper]

So I have failed smog twice due to the fuel evaporative control functional test failing. I've read a couple of threads and found that the test consists of testing the pressure between the gas tank and purge line to the charcoal cannister. I don't know much about the evap system but I wanted to know if the o ring that sits on top of the gas tank between the tank and the top that holds the fuel pump could be the culprit? A few months back my 255 lb pump went out and I replaced it with a brand new stock pump, I'm thinking maybe the o ring didn't sit right and that could be the problem? By the way I drive a stock 91 hatch ka24de. Im going to check it tomorrow but if that isn't the problem does anyone know what it could be? Thank you.

[rcdad123]

it`s worth a try.

[Tokona-x]

That O ring could most definitely be a problem I would check there first and if its not that I would then go to a shop and have a smoke test done its the quickest way to find your problem and that way you wont be just shooting at it in the dark heres a vid check it out

Auto Repair Tip Wilmington Delaware - Fuel Tank Vapor Leak 1995 Mitsubishi Galant - YouTube (http://www.youtube.com/watch?v=fHOkjEE2Po0)

[240trooper]

Thanks. I didn't have time to check the o ring but I will def. get that smoke test done. Thanks.

[rcdad123]

yeah, that smoke detector method is the shit. no more guessing.