This is kind of a dumb question but what tube is best to run a vacuum test on? I've looked on google but I can't find any info for my 2000 discovery ii . Can someone help please? Pics would be great

 

What are you testing for, what fault codes do you have and be specific?

 

Misfires on the entire left bank. Just read fresh codes in order p1300 p0303 p0305 p0307 and pending p1668. Motors runs but stalls out after about a minute of idle. I can keep it on by reviing her up though. I'm thinking a clogged catalytic converter and I will be running full tests including cylinder compression test, vacuum leak test, and exhaust back pressure test. Any thoughts mike?

 

You can use the vac line from the passenger side valve cover to the intake plenum. This will disable the "old style PCV" system during the test, but should not make a code. BTW, while there, might want to clean out that oil separator spiral plastic thingy that pokes down inside the valve cover. IACV need cleaning?

 

Also I should add that I'm having to jump start the car every time because my battery's dead. And pics savanah? I just don't wanna mess anything up. Also what do you think about my cats possibly being clogged?

 

Whoa - most weak battery issues are not vacuume related. Heres a page from RAVE, under Emissions, item 3 is the spot, air is sucked into intake plenum by the piston travel.

 

The best place is the SAI port on the plenum. If you don't have SAI there will be a little rubber cap on it that you can just pull off.

 

I know savanah just thought id throw that info in there. Thanks for the pick I appreciate it