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filler cap, on valve cover.
bad cap,? stripped out? over tightend by jiphphyboobs.
you will have to force it off and replace it,
a tedious process. get help if not knowing how to proceed.
you dont want cap parts broken off , to fall in there, see?
id attack the top part and collapse it and pull it with no debris.
P0441 JEEP - EVAP Purge System Performance Possible causes- Missing Fuel cap - Incorrect fuel filler cap used - Fuel filler cap remains open or fails to close - Foreign matter caught in fuel filler cap - Incorrect fuel tank vacuum relief valve Tech notes Loose or damage fuel tank filler cap may trigger the P0441 code
1. Make sure the car is cold. Remove the radiator cap (press & turn about 1/4 turn to remove pressure in the system) Once the pressure is bled off you can remove cap and leave it rest on the filler opening.
2. Find the petcock on the radiator (the little valve attached to the radiator. You have to open/turn clockwise to drain the anti-freeze. Drain anti freeze below thermostat housing. About 1/2 to 1 gallon.
3. Have a catch basin for the anti freeze under the car. Remove upper radiator hose from radiator and thermostat housing.
4. Remove thermostat housing from engine block (usually two or three bolts in the thermostat housing). Scrap off ALL old gasket material from engine block. Double check and make sure all gasket material is removed from surface. If not the thermostat housing will leak.
5. Install new gasket with some high temp silicone. Place a couple of dabs on the thermostat housing and gasket (the silicone is used to keep the gasket in place) *MAKE SURE YOU INSTALL the thermostat the same way you took it out. Don't over tighten the thermostat housing bolts.
6. Remove the radiator cap and replace the anti freeze you removed (make sure the anti freeze is clean). Fill the radiator to the top of the filler neck and replace the radiator cap (push and turn the radiator cap to the right- like a pill bottle). Start the car and make sure the temperture guage goes up. The guage pointer should be in the middle of the guage.
7. Check the radiator reservoir for proper anti freeze level. DO NOT OPEN THE RADIATOR CAP WHEN THE CAR IS HOT!!! THE ANTI FREEZE IS HOT AND WILL BURN YOU.
Hi, I changed gas cap and it worked. Light went off few engine start later. During my research I found a really interesting post on jeepaholics forum, it include listing al possibles causes, and fixs http://www.jeepaholics.com/support/topic.asp?TOPIC_ID=37851
this is really easy, when you take the old one off pay attention which way you have to turn it. there is nothing to set, just put the new one on the egsact way you took the old one off. It turns into position, because it turns the throtle body. so it has to turn into position. its really simple, if you have any questions, ask the parts guy to walk you threw it when you buy it.