so my check engine light has been on before and then i gotta it reset when i hooked it up to a computer where the codes said evap leak or something...at the time i didnt wanna spend 75 bucks just for them to smoke it to find the leak and then have to pay more to fix it...so i went and bought another case cap which is wiggly as heck. but yeah it fixed it for a little bit then it came back on for 2 weeks then off for a week now its back on ugh..any ideas? or know how much it would cost to fix the fuel thingy if thats whats wrong with it. thanks

 

You will have to have the smoke test done if the gas cap didn't fix it sorry.

 

I've had a similar problem. I reset it multiple times, occasionally it was accompanied by a misfire. Fixed it by replacing an evap tube elbow located on the right side of the intake manifold. Mine was dried out and needed to be replaced($2 from autozone). You might be able to push yours back in, that is if this is the problem. It usually blows out upon start-up.

 

i think i pushed it back in but do u have a pic of it by any chance? Stupid check engine lights still on

 

Check the square evap box under the jeep. Its towards the back on the driver side. There are two hoses that go there. My evap leak was comming from there. I had the smoke test done and there was a hose the was rotten. Easy to replace and you will probably see the rotten one right away. Here is a picture of what it looks like. I have an 01 also.

 

thanks for the picture bro

 

okay heres what mine looks like i took this at night soooo....

 

Those look a little rough. I would remove them (very easy, they just pop off) and inspect them in the light. Just make sure you some how mark where they go or just remove one at a time. Look for cracks or holes etc. I might even just replace both. You can see how much newer mine look compared to yourse. Check the lines going to the hoses when its light out.

 

I'll post a picture of the hoses tomorrow, when it's light out. The check engine light won't go out, it has to be reset; You can reset it by disconnecting the positive wire to your battery and touch it to the negative/ground for 5-10 minutes. That or with a code reader if you have one on hand.

 

alright thanks man. im most likely gonna replace them and if thats not the problem then ill probably go and get a smoke test

 

Three small plugs(circled on right side). It was easier to find one than take one.

 

I also have a 01 that is throwing a secondary catalyst error code. Could this be the evap canister you have described?

 

maybe

 

Hey, fellas. I have a 99 XJ (only just got it less than a month ago!) which threw the same error codes recently. I replaced the gas cap already, but I checked the elbow connectors on the EVAP box and they look about as crusty and rough as 01Cherokee_Sport's. I was going to go ahead and replace them, but I was wondering if you knew the exact size of the connectors. (I know I could probably just pop them off and take them into a parts store, but figured maybe someone knew!) One is slightly larger than the other.

Going through Autozone's website I see they have "universal connectors." Is that what I want?

Here's another noob question... If I pop off the elbow connectors and attempt to measure them myself, what am I measuring? The length of the connectors up to the right angle intersection? Or the diameter of the opening?

Like I said, I'm new at this, but I'm really excited to learn and get my hands dirty, so any info would be great. Thanks!

 

lol dude im wondering the same thing...must be a jeep thing because ive already seen 3 people with this problem aswell....oh well best of luck...if i found out anything ill let you know..