2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
Any vacuum leak can set mixture codes - cracked connectors/elbows, plastic pipes or the plenum. Hard to go back and isolate what might have been the problem.
Thanks for those pictures. I have search all over mom's 2000 Deville and could never find what that port(the one capped off) was for. I did stop by my local dealer and the parts guy gave me a pic of a parts break down. It showed a hose coming off that plugged port adding to my confusion. I put a new cap back on the extra vacuum port and will call this job done.2000 What? Deville, Seville, Eldorado - it makes a difference in quite a bit of advice.
Here's the front (passenger) end of a 2000 - 2004 Northstar intake manifold. Only one vacuum connection: The PCV dirty air line, way inside the center tunnel.
.............and the vacuum diagram for the 2000 and later engine.
Click a thumbnail to enlarge, use your browser <-- to back out.
Great instructions! All done in 2 hours, and the only real difficulty was getting the blue gaskets to stay where they are supposed to. I lubed them with oil from the manifold and after warming in the sun, stayed where they should. The front drivers side manifold bolt was a pain, but all in all I surprised myself! Great instructions!First I want to say Thanks for all the help and tips from this Great Board !!!!
This is how I did this procedure...
1) Removed gas cap
2) Pop hood remove Top cover and bleed off pressure from fuel rail pressure relief valve
3) Take off top of air box and air tube closest to tb, unplug maf plug
4) Just loosen the 10mm nut that holds fuel lines down and undo lines from the black clip on top
5) Unclamp the top line on the coolant jug (a little might come out) Lay it to the side
6) In front just unhook one vacume line and unplug the plug going into coil pack
7) In back just unhook the vacume lines that are in the way (I think it was 4 or 5 of them) and unplug the plug going to that coil pack
8) Take the 4 10mm bolts out that hold the fuel rails down
9) Carefully pull up on the fuel rails evenly, they will all pop out together, pull them straight up together you'll have to wigle it around a little but you can get enuff room to work
10) Take the 10 10mm bolts out of the manifold
11) Loosen the plenum bolt (The strap clamp) there are also 3 10mm bolts that hols the plenum in. You'll see them from driver side, pretty easy to get to
12) Hold the fuel rails up out of the way and start from passanger side and lift the manifold up and out
13) Turn manifold over replace all 8 Blue gaskets (most local parts stores have these $15-$20 for a set of 8 )
14) Take off old plenum ( I used a big screwdriver and pryed up around the sides)
15) Put your $30 new plenum on (the same way the old one came off)
16) I took my shop vac and vacumed out everything so nothing would fall in engine, then just wiped it down with old shirt rag
17) Hold fuel rails back up and drop the manifold back into its home
18) Reasemble everything you just did. On the manifold bolts just start in the middle and work your way around, don't tighten till there all hand tight.
Thats pretty much it. Of course inspect everything as you go.
When i did this job all 10 of my manifold bolts were loose like all of them were just hand tight. I thought that was crazy..
The whole job took me about an hour and a half. because i have never done this before. Stealership probably can do it under an hour. Started it up and it runs perfect. :highfive:
Hope this helps Thanks for Everything