- Location
- where compton meets the water
Also do I need to unplug the battery and reset the brain or anything?
Make sure to buy NTK/NGK O2's and NOT Bosch.
1/2 tank of gas later and same, 10 mpg. Blew a hole in my muffler this morning and replaced it with a Flowmaster. Could a crappy muffler affect mileage? Didn't' notice a power difference after the switch so I don't think it was choking it.
Check the basics, …... Nearly all XJ's have or will have a cracked exhaust manifold.
Not to likely but a clogged cat will.
Could a bad temperature sensor be a possibility? Just spit balling.
secondary to the temp sensor attached to the temp gauge?
torque converter clutch not engaging will do it for sure, since without the clutch you are relying on hydraulics alone. if you feel like the trans is shifting weird I would probably start there.
check for fuel leaks / damp fuel lines (no kidding)
use the key trick to pull codes and see if anything there that didn't trip the CEL
are you running a 180 or 165 thermostat? the computer tries to get the engine temp to 195 by running a rich mixture so that the cat converter works efficiently, if temp stays low the computer will forever be dumping unnecessary fuel. O2 sensor can do it too but not usually that aggressive
Last year after buying the jeep it passed smog with flying colors because the previous owner spent a ton of money on it including the intake system so it could pass and she could sell it so I assumed all that would be in order. So I'll put that on the list with exhaust manifold and vacuum leaks. I sprayed with brake cleaner for vacuum leaks but think I may buy one of those $40 smoke kits on ebay.No, that exact one, on the thermostat housing.
Also do you know if your spark plug gap is correct?
Could a bad temperature sensor be a possibility? Just spit balling.