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Rumgod
September 24th, 2017, 12:46
Hi, newbie here working on my jeep, it's 2000 XJ, 4.0L, 4x4, 3.5" lift, auto 180,000 miles. I've had it about 3 months and and have gone thru just about all the usual things to create a good baseline, hoses, oils, ignition, fluids, etc.
I had been aggravated with my mileage, the last thing I did was replace the upstream O2 sensor( I left downstream as it was), cleaned MAP and IAC sensors and my city mileage went from 9-11mpg to ~14.5mpg and on a controlled test(full tank of gas) run on a 60mile highway run I went from 14mpg to 21mpg at 65mph on cruise control. I'm happy now.

I do have a question though, I'm a bit of a stickler about "everything in its place" and there is a bolt stuck in the intake manifold that doesn't seem to be OEM, I can't find any pics or references to this 'port' that someone apparently blocked, maybe not stock intake manifold?!.
Can anyone help or identify this? here's a pic I took a while ago.

Thanks! -Art :)

https://i.imgur.com/dq3SZfh.jpg

Rumgod
October 7th, 2017, 09:37
still no help :(
Hope someone will see this and have an answer for me

RCP Phx
October 7th, 2017, 09:58
It's not used on my 2000!

Tim_MN
October 7th, 2017, 13:07
The manifold and the port are stock, and that port is always plugged. The stock plugs disintegrate.

Ralph77
October 8th, 2017, 00:57
It is in use if you have a '00 with CA Emissions. Capped off if you have an '00 with Federal Emissions. Most but not all '00's came with CA Emissions. All '01's are. At least that is my understanding. Go buy something like this just to clean it up if that bugs you. They go right over the nipple on the intake manifold.

https://shop.advanceautoparts.com/p/dorman-conduct-tite-1-each-5-32-in-7-32-in-5-16-in-3-8-in-and2-each-3-16-in-1-4-in-black-vacuum-caps-85609/22141294-p?c3ch=PLA&c3nid=22141294-P&c3apidt=23501155054&gclid=EAIaIQobChMI9KfPn7ng1gIVzwOGCh0oCw0bEAQYASAB EgLiJPD_BwE&gclsrc=aw.ds

Heavyopp
October 8th, 2017, 20:15
I have a '00 with cali emissions -- I don't think that is capped on mine -- don't know where it goes off the top of my head but I'll check tomorrow and report back

Ralph77
October 9th, 2017, 01:27
I have a '00 with cali emissions -- I don't think that is capped on mine -- don't know where it goes off the top of my head but I'll check tomorrow and report back

It should not be. Goes to the purge solenoid, think that is what it is called, that is in front of the blower motor in the engine compartment.