Why does my Jeep Wrangler have a PCV valve?
Might try your nearest Chrysler/Dodge/Jeep dealer. The purpose of the PCv system is to suck fumes out of the crankcase and burn them. The valve was put in the line in case of backfire – if there was an explosion in the intake it would slam and prevent flame from getting in the crankcase.
Where is the valve on a Jeep Wrangler 4.0?
The valve was put in the line in case of backfire – if there was an explosion in the intake it would slam and prevent flame from getting in the crankcase. TJ’s etc with the 4.0 do it differently. There is a long small plastic vacuum line that runs from the intake to the filler cap at the back of the engine.
What happens when the PCV valve on a crankcase fails?
In addition, you may also notice oil leaking through the seals and dripping on to the floor of your garage. This is because the pressure in the crankcase may increase when the PCV valve fails, so the oil is pushed out through the seals and gaskets since there’s no other way for the pressure to be released.
What to do if your PCV valve is leaking?
The leak will cause your vehicle to burn oil and leak oil beneath your vehicle. If you notice either of these, consult a professional mechanic to have your PCV valve replaced.
Might try your nearest Chrysler/Dodge/Jeep dealer. The purpose of the PCv system is to suck fumes out of the crankcase and burn them. The valve was put in the line in case of backfire – if there was an explosion in the intake it would slam and prevent flame from getting in the crankcase.
The valve was put in the line in case of backfire – if there was an explosion in the intake it would slam and prevent flame from getting in the crankcase. TJ’s etc with the 4.0 do it differently. There is a long small plastic vacuum line that runs from the intake to the filler cap at the back of the engine.
What to do if your PCV valve is not working?
Try thoroughly cleaning the inside of your throttle body with a can of aerosol throttle body cleaner. The IAC (idle air controller) that feeds all of the engine’s air into the engine at idle when you’re not stepping on the gas might be sticking and not letting enough air into the engine at idle.
Where is the IAC located on a Jeep Wrangler?
The IAC is bolted onto the passenger-side of the throttle body and it gets its air for the engine through the slot on top of the throttle body’s butterfly valve plate that is closed at idle. Make sure some of the cleaner gets into that slot (idle air control passage inlet) as you can see in the below illustration.