Hi,
I got a p0442 evap leak last week on my 99 4.0 Cherokee XJ. I only have 72,000 miles.
I was poking around the connections of pipes that I think are part the evap system and found cracks on one of the elbows. I am hoping based on the pictures you can help me identify the part number of the elbow I need. I think (but am not sure) that it goes from the leak detection pump to the intake manifold. Thanks a million!!

 

Cant help with the part number, but most parts stores have a display somewhere with various vacuum lines and fittings. There is usually something that will work, without looking rigged.

 

This is just for the 2 front elbows on the intake manifold. The one you have marked can be fixed with a little piece of hose. The nipple on the intake and the plastic line are the same size. I can't tell you what size though because I grabbed a piece out of the off cut pile we have in the auto parts store I work at. So just find the size that works. The middle is a bit more of a challenge because the nipple on the manifold and the plastic hose are different sizes. I found that this works. Dorman Part # 46022 or at Napa Part # NOE 6301670.

 

Yeah, that elbow and pipe go to the leak detection pump. I went to the dealer and you can't buy just the elbow, you have to buy the whole pipe assembly. I didn't ask the price, he had to order it anyway. A short piece of 1/4" fuel hose took care of it. Because of the angle, I put a snap clamp on it. The large one goes to the canister purge solenoid and is different sizes on the pipe and manifold.

NAPA on their HELP carousel had an elbow but it was packaged in a plastic bubble and I couldn't tell if it was the right size or not and I wasn't going to pay that much unless it would work, so I used the fuel hose.

 

Wouldn't hurt to change the dry rotted elbow but P0442 is commonly caused by a defective seal in the gas cap. Try replacing the gas cap (OEM recommended) and see if that helps.

 

Thanks guys, I'll stop buy the autopart store later this week, I'll let you know how it goes.