EVAP flow fixed
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Senior Member
Joined: Apr 2013
Posts: 834
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From: Ontario
EVAP flow fixed
I had massive codes and engine almost stalling problems a year ago due to something clogged in the evap system rig right above rear axle.
To temporarely "fix" it for the winter I disconnected the line going up front so that it sucks outside air vice fuel fumes therefore letting the system breath. Trade off is noticeable decrease in fuel mileage.
Today I took off all hose from the charcoal canister rig and blew them out and also took the little screen filter on the valve and blew/cleaned it untill all the dust and rust particle were gone. I also got rid of the line going into the air box inside the frame since it was the cause of the clogged screen. I simply added a little air filter (valve cover breather 12$) at the end of the hose and mounted it as high as I can undrr the bed in order to keep it from getting wet.
I then reconnected everything, started the truck and let it warm up to operating temperature. I then listened for air entering the little filter I added and SUCCESS!! everything is flowing smoothly and engine is idling at a steady 700 RPM with no hiccups.
To temporarely "fix" it for the winter I disconnected the line going up front so that it sucks outside air vice fuel fumes therefore letting the system breath. Trade off is noticeable decrease in fuel mileage.
Today I took off all hose from the charcoal canister rig and blew them out and also took the little screen filter on the valve and blew/cleaned it untill all the dust and rust particle were gone. I also got rid of the line going into the air box inside the frame since it was the cause of the clogged screen. I simply added a little air filter (valve cover breather 12$) at the end of the hose and mounted it as high as I can undrr the bed in order to keep it from getting wet.
I then reconnected everything, started the truck and let it warm up to operating temperature. I then listened for air entering the little filter I added and SUCCESS!! everything is flowing smoothly and engine is idling at a steady 700 RPM with no hiccups.