EVAP Delete
Racer
Joined: Nov 2006
Posts: 441
Likes: 6
From: Sunshine State
Trying not to beat a dead horse but this may be the most recent post on this topic. Through my searches I have not found if someone has just removed the engine bay EVAP Purge Solenoid and tied up the harness, then instead of completely capping off the plastic line or leaving it vent to atmosphere in the engine bay could you just run a hose attaching it back to the intake manifold so it still pulls the vapors back into the engine like intended? Obviously the code will still need to be deleted in a tune but this would eliminate leaving it open to atmosphere or completely closing it off. Would the constant vacuum from the motor cause any problems?
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,615
Likes: 4,062
From: Cape Coral, Florida
With the purge solenoid absent in the system you will basically have a vacuum leak…the vent valve is “normally” open at the other end…also after fueling the car with all those fuel vapors in the EVAP canister you may have trouble starting the car due to that rich mixture…after the vapors are burned then you will have a lean mixture…a double whammy !!…2 different DTC’s.
Racer
Joined: Nov 2006
Posts: 441
Likes: 6
From: Sunshine State
With the purge solenoid absent in the system you will basically have a vacuum leak…the vent valve is “normally” open at the other end…also after fueling the car with all those fuel vapors in the EVAP canister you may have trouble starting the car due to that rich mixture…after the vapors are burned then you will have a lean mixture…a double whammy !!…2 different DTC’s.
Navigator
Joined: Nov 2024
Posts: 9
Likes: 0
Trying not to beat a dead horse but this may be the most recent post on this topic. Through my searches I have not found if someone has just removed the engine bay EVAP Purge Solenoid and tied up the harness, then instead of completely capping off the plastic line or leaving it vent to atmosphere in the engine bay could you just run a hose attaching it back to the intake manifold so it still pulls the vapors back into the engine like intended? Obviously the code will still need to be deleted in a tune but this would eliminate leaving it open to atmosphere or completely closing it off. Would the constant vacuum from the motor cause any problems?
Le Mans Master
Joined: Jun 2008
Posts: 5,284
Likes: 235
From: Rockledge FL
true but the Feds aren’t doing emissions testing in Floridia so while it may still be illegal what federal agent is going to be looking under a hood?
Race Director
Joined: Jun 2004
Posts: 13,961
Likes: 707
From: WI
You don't have to drill a hole in the gas cap like suggested. Many things like lawn mowers etc use a vented cap. There are caps that have a variety of different vent pressures as well.
