 5 symptoms need help diagnosing, added a problem... probably culprit |
|
|
|
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. |
|
|
  |
| john rogers |
 Oct 20 2010, 10:35 AM
Post
#21
|
|
Senior Member  Group: Members Posts: 1,525 Joined: 4-March 03 From: Chula Vista CA Member No.: 391  |
If you have a throttle body with ONE hose nipple then the vacuum line goes to the retard side of the advance mechanism or side closest to the cap. If you have TWO hose nipples then check to see which one has a vacuum at idle and hook it to the retard side and the other one to the advance side. On our 1974 it originally had two hoses as many do but ONE nipple and the advance hose just was laying on the intake plenum. In the "old days" this would give the smog check people fits but was factory.
You can and probably should open the bypass screw a little and the idle will come up, it does NOT need to be closed. |
   |
 
|
| steveherman |
Oct 20 2010, 07:38 PM
Post
#22
|
|
Member Group: Members Posts: 380 Joined: 12-September 09 From: Kissimmee Florida Member No.: 10,799 Region Association: South East States |
QUOTE(rick 918-S @ Oct 20 2010, 08:46 AM)  Sounds like your on track. Here is a hose diagram. Take the AAR out and test it. i just noticed a difference in diagram from PP site. the middle hose from the decel valve is shown hooked up in different places. on pp it goes to the air cleaner and the one rick showed it goes under throttle body. the back hose on pp goes under the throttle body and the one rick shows it goes to the air cleaner box. which is right? |
|
|
|
| steveherman |
Oct 23 2010, 10:45 PM
Post
#23
|
|
Member Group: Members Posts: 380 Joined: 12-September 09 From: Kissimmee Florida Member No.: 10,799 Region Association: South East States |
can someone look at the vacuum diagram rick posted and the one i posted from pelican parts... and tell me which one is correct?
thanks |
|
|
|
| rick 918-S |
Oct 24 2010, 07:51 AM
Post
#24
|
|
Hey nice rack! -Celette Group: Members Posts: 20,503 Joined: 30-December 02 From: Now in Superior WI Member No.: 43 Region Association: Northstar Region 
|
I'm no expert but maybe those are two different year diagrams. PM Jeff I bet he'll know. Or there are any number of guys on here that live and breath the details. Just a matter of having the right guy check the thread. I bet Clay would know too. Oh, and Ed or ron or the capt.... or... (IMG:style_emoticons/default/laugh.gif) anywho, here's a (IMG:style_emoticons/default/icon_bump.gif) for ya.
|
 |
|
| swl |
Oct 24 2010, 08:01 AM
Post
#25
|
|
Senior Member Group: Members Posts: 1,409 Joined: 7-August 05 From: Kingston,On,Canada Member No.: 4,550 Region Association: Canada |
I don't think the difference means anything. The top is the sensor port. On high vacuum it just opens a shunt allowing more air from the air filter into the plenum. Shouldn't matter which way the bottom 2 go.
I agree with you. Vacuum leaks cause high revs not low. Have you tried th air bypass screw to bring up the revs? The stumble on accel might be the advance. Have you checked to see if it si working? |
|
|
|
|
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 16th June 2024 - 11:16 AM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.