GTO twin turbo vacuum leak

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GTO twin turbo vacuum leak

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Mitsubishi >> Mitsubishi Models >> Mitsubishi 3000GT >> GTO twin turbo vacuum leak

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GTO twin turbo vacuum leak - 7/25/2007 9:59:09 PM

freakosaurus

Posts: 31
Joined: 5/8/2007
Status: offline

So I got my gleaming polished intake plenum today from 3sx...swapped it out with my old one, and now my car runs like a pile. It stalls if you dont give it gas. I noticed that when I romped on it though, that my boost guage would drop dramatically as my turbos spooled. Ok, so vaccuum leak I figured. Theres some sort of sensor tagged onto a line coming from the top of the plenum itselft (it's also 'tee'ed' to go to my boost guage). Its mounted on the friewall close to the battery, and has 3 outets. Is this for the factory boost guage? anywho, I noticed that after hooking that up, there was an extra port on it that felt like vaccuum on the bottom (facing down towards the engine). Im pretty sure that I hooked it up right, but does anyone have any info about this piece and where it is supposed to go?

Post #: 1

RE: GTO twin turbo vacuum leak - 7/26/2007 6:49:14 AM

thestealth

Posts: 1202
Joined: 5/27/2004
Status: offline

You must have forgot to hook up one of the vac. lines. Can you get a picture of the open port that you speak of?

The factory boost gauge does not read vacuum/boost. It gets its information from the ECU, it only shows where the ECU "thinks" the boost would be. It is more of a engine load guage than a boost guage.

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(in reply to freakosaurus)

Post #: 2

RE: GTO twin turbo vacuum leak - 7/27/2007 11:27:51 PM

freakosaurus

Posts: 31
Joined: 5/8/2007
Status: offline

ok so I got my baby running. I really had no idea that the EGR valve block plate (on the firewall side of the plenum) had a gasket. I looked at my old plenum and noticed a mashed ugly little piece of metal that used to be a gasket. Freighted a new one in from cali overnight, slapped er on, and away I go! Yay, problem solved for under $10! that's not common with these cars hahah.

(in reply to thestealth)

Post #: 3

RE: GTO twin turbo vacuum leak - 7/28/2007 6:34:12 AM

thestealth

Posts: 1202
Joined: 5/27/2004
Status: offline

...I love it when it's an easy (and cheap) fix.

(in reply to freakosaurus)

Post #: 4