Unknown parts

canival36 · #1 05-21-2009, 08:34 PM

Hi, i just started working on my 99 ranger flex fuel, and i found a hose coming from my gast tank that leads to a smaller tank next to my spare, does any one know what that is (its really bothering me), did i mention it was diconected?

Alon · #2 05-21-2009, 09:33 PM

It is the evap canister

Quote:

An evaporative canister is part of the evaporative system that is within the emission system. Hydrocarbons are a form of pollution that gasoline releases as it evaporates or after is is burned. While fuel is stored inside the tank, fumes build up and are retained inside this canister. The canister contains charcoal that absorbs the hydrocarbons. When the engine is started, a valve opens that allows fresh air to come in and purge the fumes (hydrocarbons) into the air intake and then into the combustion chamber for burning. I understand that more hydrocarbons are released into the atmosphere by leaving your fuel cap off, than what comes out of your tailpipe while the engine runs. If there is a leak anywhere in the evaporative system, such as a bad hose, canister leak or leaving the fuel cap loose, the check engine light will set.

98blownranger · #3 05-22-2009, 06:57 AM

yes it is the evap, you need it or you will get a CEL

colonel D · #4 06-08-2012, 02:25 PM

Hello does anyone know how to fix evaporative emission control leak check engine codes small and large PO 442 and PO 455? There is also an irritating tick tick tick noise seems to come from under the front to under door fender area on a 2000 3.0 V6. Thank you I know the original post is old but am having trouble creating new posts.

03rangdang · #5 06-09-2012, 02:50 PM

PO455 is a large leak.