I believe it is behind the rear passenger tire. You have to pull out the plastic in the wheel well to get to it.
Leak detection pump.
Leaking heater core
You probably have a vacuum leak.
a quick way is to spray some carb cleaner around all the hoses and intake and listen for a rise in rpm, and if a leak is present you'll hear a sucking sound anyways.
A replacement leak detection pump for a 2002 Jeep Liberty with a 3.7 liter V-6 engine is between $100 and $110, depending on where it's purchased. The Mopar part number is 4891416AD.
possible faulty leak detection pump
Yes, the studs break off of the head at the ends of the manifold.
You will need to replasce the heater core.
The most common cause for surging is a vacuum leak
American Leak Detection was created in 1974.
American Leak Detection's population is 30.
Well, I have an 89 jeep wrangler with a really bad oil leak, and I just found it, it's the oil pressure switch. I can see the oil leaking with the motor running. I called my favorite mechanic and he said definitely, that's the problem. I'm off to replace it now.