On the valve cover, there is two plastic elbows and your oil fill cap. The two elbows are what helps your engine breathe, and they connect to the airbox in such a way that they only "breathe" filtered air.

 

The rear line on valve cover goes to intake vacuum. The front goes to air box and should be filtered. DO NOT BLOCK THESE. The other large hose comes from the evap can and should also run to the intake.

 

Rear line is still where it should be. Front line is just loose so I'll extend the line and run it to the snorkel tomorrow. Are those the only two lines that should be breathing? Intake and front valve cover line? Others have something they should be plugged in to?

 

Sorry about that, slick, I keep forgetting renix is different

 

All gravy.... yours isn't hooked to vacuum?

 

I know there's two that go to the airbox. One is def the front ccv, and the rear one probably goes to intake, and then a different one goes to the airbox. I just replaced both ccvs and grommets too.

 

That different one going to the airbox is from the evap

 

Oh.

 

Let's just jury rig this and do it the sneaky way. Dump 10 ounces of Acetone in there and that'll lean you up.

 

Well my excitement was short lived. Just went out and cranked the jeep after I messed with my snorkel a bit. Installed a piece that was to restricting to the air flow. Cranked it and let it run for 10-15 seconds then I gunned it a bit. When I really revved it up it BLEW black smoke. When it was at idle the exhaust was clear.
Took out the restrictive piece, no big deal. Intake was totally clear, repeated steps 1 and 2, still blew smoke. I mean heavy, it dyed the grass below the pipe black.
Is this just carbon buildup from the vacuum leak being present for so long, being blown out? If not, what's the problem?

 

WHen I had this problem, I had a vacuum leak. Mine turned out to be the gay control. I mean cruise control. I bypassed it with a vacuum cap since I never used it.

I had your EXACT symptoms, and I'm here to tell you you have one hell of a vacuum leak. I had a hard time tracing it because I could never hear the damn thing. My cruise control diaphragm was stuck open a little. Whenever I gunned it driving down the road the car behind me got smoked out.

You definitely have a vacuum leak. The MAP is sensing the amount of air you have at the intake. The air is getting through to your manifold after the MAP, so you're actually getting more air into the cylinder(s). The 02 reads the lean conditions and dumps more fuel in to correct it. There's also a good possibility that you have a small exhaust leak so clean air is going right into the 02 sensor. Either at the collector on your exhaust manifold, or maybe your intake/exhaust bolts have loosened up. I've actually had that happen to me a few times. Seems like I can't drive this thing 400 miles without needing to retighten those damn bolts. The more engine vibration you have the more they work themselves out faster.

 

I probably have about 4 little lines just loose, sucking in air very strongly, very loudly. Plug these? My friend has a stock '96 XJ, should I compare to see where all of the lines go?

 

Also I'm idling around 100-300 rpm

 

Should I break down and take it to my local mech? Tell him to find the vacuum leak?

 

Sounds like an extremely rich situation.:-D