Yes you need it to keep your engine light from coming on.
It is also called an evaporative emission canistor. The fuel system is completely sealed and any fuel that evaporates goes into the canistor and the porous charcoal absorbs the gas. When you start your engine back up the vacuum from the enigine uses up those vapors.
Its basically useless to the mechanics of the engine, but if it leaks the ecm detects a loss of vaccum and trips the check enigne light.
Most people call it a dummy light because it doens't affect the performance of the engine, it just makes the tree huggers angry that tiny bits or your fuel is evaporating into thin.
Although as much as gas is now, I don't want any of it evaporating either
I have the old 4.2L and the evap canister is one of the few pieces of emissions equipment I still have! Not sure if it applies to the 4.0 but someone was saying they were getting a fuel smell in the vehicle when they had a problem with the cannister
I have a 4.2 nuttered with a weber on it and am slowly getting rid of my emission stuff however I am hearing you need it as the tank vent is on itas well as vac lines going to the CTO and one is ported vacuum.If you dont need it then how did you guys route the vacuum lines ? Thanks
As long as there is not a vacuum leak there is no performance benefit to removing the canister. Plus, if you do remove it then you have to deal with the fuel tank vent another way which then means gas fumes elsewhere. I would try to keep it.
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Jeep Enthusiast Forums
18.5M posts
726.8K members
Since 2000
A forum community dedicated to all jeep owners and enthusiasts. Come join the discussion about performance, engine swaps, modifications, classifieds, troubleshooting, maintenance, and more!