Havnt seen tht term before can u break it down

 

onboard refueling vapor recovery

it employs a carbon filled canister that allows vapors to vent into when refueling.

gas vapors trapped here are then used as fuel.



i think every car made after 2000 was required to have them, but I dont know if they came on XJ's before that.



edit: just saw you have a 2000, so this very well may be your problem. look near your tank for the little canister, take it off and clean it out. probably spider webs in it.

 

These can be serviced? I kno there's a s*** load of dried mud around it. How do I go about cleaning it?

 

well that could also be part of the problem.

i believe you can just unscrew it from the body, but if its one that is hidden (ie, you can see a hose going into the body but not to the filler), then take off the hose and clean it out with a screwdriver. just gotta get it so that the vapors can flow through.


take pics of it, i'd like to see where its located and all.

 

Ive never heard of this either and i have worked as a mechanic for many years. One thing i have noticed with gas tank issues is debris inside the tank. i have found everything from foreign military belts to plastic bags inside tanks. I guess there are people who just open random gas tanks and shove items down in there. It is the only explanation i can come up with for how these items wind up in gas tanks. They can cause all sorts of problems. If you dont want to take your car to the shop ( i dont blame you with all the hacks these days) you are just going to have to start taking stuff apart. The good news is that you know where the problem area is. Good luck!

 

all gas tanks have a vent that comes up and connects to the filler just a few inches below the top. My sujestion to you is to check that.... and check gas cap....

the vent tub is right beside the filler .. I just looked at mine.. and its hard to see.. but there is a vent tube

 

Ok I'll check the vent tube in a lil bit. 12 degree weather sucks !

 

I think that you should never go to a shop, if you have the will to do the work yourself. Theres nothing they can do that you cant.

 

well i'm not kidding.

http://www.fraqmd.org/ORVRfact.htm


every vehicle produced in 2000 and later has it.

40 percent of vehicles in 1998
80 percent of vehicles in 1999


so you have it on your xj.

 

yes, cars before this new system have this.

newer cars have the orvr canister, making the vapor catchment system found of refueling nozzles useless to newer cars.

 

Sounds like the vent tube is plugged/kinked to me. Had this problem on other vehicles. Fixed the problem.

 

it has a vent just like i said it does...the vapor canistor is for polution control.... and has absolutly nothing to do with refueling car...
You have to beable to vent just as much air out of tank as gas going in... that can only be done with a vent in the filer neck.....

 

i meant to say i have never heard of a tank not venting like this not that i have never heard of the venting systems. But suggestions seem right with the vent tube. Everything you need to check is going to be around that location. The only time i have encountered a problem similar to this is when people run their gas down to almost nothing to basically fumes and then fill up immediately.

 

read this. straight from the EPA.

http://www.epa.gov/oms/regs/ld-hwy/onboard/orvrq-a.txt

 

The canister being discussed should look something like these. My 08 libby has one but my other jeeps do not.