2003 TJ 4.0L engine code
- Thread starter kd8isg
- Start date
RudeDog
New member
From what I read it could be the gas cap, not tight or not sealing. Also found info on possible hoses:
1 - inside drivers side of frame where the evap fuel line (top line) turns to hose and then connects near the fuel rail.
2 - under the drivers side of the hood, bottom of two black cylinders one is the LDP and the filter i believe. (between master cyl and coolant res.)
3 - under the drivers side of the hood, big black box (evap canister i believe) (right next to coolant res. ) to test valve . (green cap connected to a few hoses)
if you dont see anything, check over the whole evap system. all those hoses around the canister (black box) and the cylinders. youll probably end up finding something there.
1 - inside drivers side of frame where the evap fuel line (top line) turns to hose and then connects near the fuel rail.
2 - under the drivers side of the hood, bottom of two black cylinders one is the LDP and the filter i believe. (between master cyl and coolant res.)
3 - under the drivers side of the hood, big black box (evap canister i believe) (right next to coolant res. ) to test valve . (green cap connected to a few hoses)
if you dont see anything, check over the whole evap system. all those hoses around the canister (black box) and the cylinders. youll probably end up finding something there.
jtm703
New member
If it's an evap leak code, this thread from a couple of years ago may be useful...posted pics toward the bottom of what I found. Hope it helps.
http://www.jeepz.com/forum/cj-yj-tj-jk/28903-evap-leak-code-03-tj-4-0-auto.html
http://www.jeepz.com/forum/cj-yj-tj-jk/28903-evap-leak-code-03-tj-4-0-auto.html
Thanks!
RudeDog I,m going to check it out this weekend this is very helpful. I will get back to you with what I find and post it.
QUOTE=RudeDog;286403]From what I read it could be the gas cap, not tight or not sealing. Also found info on possible hoses:
1 - inside drivers side of frame where the evap fuel line (top line) turns to hose and then connects near the fuel rail.
2 - under the drivers side of the hood, bottom of two black cylinders one is the LDP and the filter i believe. (between master cyl and coolant res.)
3 - under the drivers side of the hood, big black box (evap canister i believe) (right next to coolant res. ) to test valve . (green cap connected to a few hoses)
if you dont see anything, check over the whole evap system. all those hoses around the canister (black box) and the cylinders. youll probably end up finding something there.[/QUOTE]
RudeDog I,m going to check it out this weekend this is very helpful. I will get back to you with what I find and post it.
QUOTE=RudeDog;286403]From what I read it could be the gas cap, not tight or not sealing. Also found info on possible hoses:
1 - inside drivers side of frame where the evap fuel line (top line) turns to hose and then connects near the fuel rail.
2 - under the drivers side of the hood, bottom of two black cylinders one is the LDP and the filter i believe. (between master cyl and coolant res.)
3 - under the drivers side of the hood, big black box (evap canister i believe) (right next to coolant res. ) to test valve . (green cap connected to a few hoses)
if you dont see anything, check over the whole evap system. all those hoses around the canister (black box) and the cylinders. youll probably end up finding something there.[/QUOTE]
