 Vacuum Hose Question, For a 73 2.0L |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
| billd |
 Sep 30 2005, 12:16 AM
Post
#1
|
|
Member  Group: Members Posts: 327 Joined: 25-May 05 From: Palo Alto, CA Member No.: 4,145  |
I finished restoring the D-Jet EFI on my 73 2.0L and fired it up. It runs!
However, I have a few questions about routing the vacuum hoses. 1. There are two vacuum fittings on the distributor. A 5mm fitting on the near side (toward the distributor) and a 3mm fitting on the far side. The 5mm appears to go to a connection on the far side of the throttle body. Where does the 3mm fitting go? I've seen pictures that show it going to a fitting on the near side of the throttle body, but there is no fitting there on my car. 2. There are two 11mm vacuum connections on the side of the plenum toward the battery. Where do these go? Does the connection on the oil filler go to one of them and the decel valve to the other? I've seen pictures with a "F" shaped rubber fitting on one of these connections. Is that fitting needed? If so to route to where? Thanks, ----Bill |
   |
 
|
  |
Replies(1 - 12)
| TravisNeff |
Sep 30 2005, 12:37 AM
Post
#2
|
|
914 Guru Group: Members Posts: 5,082 Joined: 20-March 03 From: Mesa, AZ Member No.: 447 Region Association: Southwest Region 
|
The larger fitting is your vacuum retard, it goes on the throttle body below the throttle plate, the smaller fitting is your vacuum advance, and it goes to the port above the throttle plate (on the throttle body).
Unless you have a 74+ throttle body, in which case there is no vacuum advance port. If that is the case, don't worry about the advance port on the distributor. |
|
|
|
| billd |
Sep 30 2005, 12:44 AM
Post
#3
|
|
Member Group: Members Posts: 327 Joined: 25-May 05 From: Palo Alto, CA Member No.: 4,145 |
OK, I must have a 74 throttle body. My EFI system is all 74 components.
By "don't worry" do you mean leave the connector open or plug it? What about the large (11mm) connections on the plenum? |
|
|
|
| TravisNeff |
Sep 30 2005, 12:54 AM
Post
#4
|
|
914 Guru Group: Members Posts: 5,082 Joined: 20-March 03 From: Mesa, AZ Member No.: 447 Region Association: Southwest Region
|
The factory put a hose on the vacuum advance port, but just left it sitting loose on top of the engine, strange but true. The 11mm ports would be for your decel valve (if you have one, I don't and the hole is plugged), there is another and I believe that goes to the PVC valve at the base of the oil filler neck.
|
|
|
|
| Gint |
Sep 30 2005, 06:33 AM
Post
#5
|
||
|
Mike Ginter Group: Admin Posts: 16,076 Joined: 26-December 02 From: Denver CO. Member No.: 20 Region Association: Rocky Mountains  |
Travis is absolutely correct on all counts. The fact is the later 2.0 did not use vacuum advance, just retard. I tried to run a 74 2.0 through smog in CA once a few years ago. The factory ran that advance hose up near the TB and left it laying there. The more anal SMOG tech must see a hose, or they will fail you on a visual. |
||
|
|
|
||
| Bleyseng |
Sep 30 2005, 08:13 AM
Post
#6
|
||
|
Aircooled Baby! Group: Members Posts: 13,035 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
Nope, the PCV valve at the oil breather goes to the plenum not the air box port on a 73-74. |
||
|
|
|
||
| Dave_Darling |
Sep 30 2005, 09:39 AM
Post
#7
|
|
914 Idiot Group: Members Posts: 14,990 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
|
Check the "EFI Hose Diagrams" on the Pelican site.
--DD |
|
|
|
| type47 |
Sep 30 2005, 10:07 AM
Post
#8
|
|
Viermeister Group: Members Posts: 4,254 Joined: 7-August 03 From: Vienna, VA Member No.: 994 Region Association: MidAtlantic Region |
similar to what dd is referring to:
Attached image(s) 
|
|
|
|
| TravisNeff |
Sep 30 2005, 10:52 AM
Post
#9
|
||||
|
914 Guru Group: Members Posts: 5,082 Joined: 20-March 03 From: Mesa, AZ Member No.: 447 Region Association: Southwest Region
|
That is what I was saying. |
||||
|
|
|
||||
| billd |
Sep 30 2005, 12:42 PM
Post
#10
|
|
Member Group: Members Posts: 327 Joined: 25-May 05 From: Palo Alto, CA Member No.: 4,145 |
Is there a separate PCV valve in the line from the oil filler to the plenum or is this valve built into the oil filler somehow?
|
|
|
|
| TravisNeff |
Sep 30 2005, 12:50 PM
Post
#11
|
|
914 Guru Group: Members Posts: 5,082 Joined: 20-March 03 From: Mesa, AZ Member No.: 447 Region Association: Southwest Region
|
The PVC valve is at the base of the filler assy. It is a white plastic disc, you can remove the filler assy from the case and unscrew the PVC vavle from it and replace. Cheap from the dealer, just a couple bux.
|
|
|
|
| Gint |
Sep 30 2005, 04:51 PM
Post
#12
|
|
Mike Ginter Group: Admin Posts: 16,076 Joined: 26-December 02 From: Denver CO. Member No.: 20 Region Association: Rocky Mountains |
niggly little bit...
PVC is some form of plastic. PCV is Positive Crankcase Ventilation (IMG:http://www.914world.com/bbs2/html/emoticons/beerchug.gif) It's beer:30!!!!!!!!!!!!!!! |
|
|
|
| TravisNeff |
Sep 30 2005, 07:39 PM
Post
#13
|
|
914 Guru Group: Members Posts: 5,082 Joined: 20-March 03 From: Mesa, AZ Member No.: 447 Region Association: Southwest Region
|
At least I got the common demoninator, it is all plastic.. (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif)
|
|
|
|
|
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 25th May 2024 - 01:57 AM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.