vacuum advance stuck?, can't get it to move by sucking on it |
|
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. |
|
vacuum advance stuck?, can't get it to move by sucking on it |
turk22 |
Sep 15 2013, 11:03 AM
Post
#1
|
Treetop Flyer Group: Members Posts: 735 Joined: 27-July 12 From: Cincinnati OH Member No.: 14,725 Region Association: Upper MidWest |
(IMG:style_emoticons/default/dry.gif)
I'm in the process of installing the Pertronix ignition, but before I do, I wanted to A: confirm the advance was working B: regarding McMarks thread, make sure I didn't have interference with the little advance needle While removing the points, I see a little movement (very little) of the plate. But when hooking a hose up, and sucking on it, I'm able to get any movement at all. How freely should the plate move (how much vacuum is needed to get it to move? How much movement should there be in the plate? Is there a way to lubricate the plate, without dismantling the vacuum advance? (nervous enough just having removed the distributor) (IMG:style_emoticons/default/blink.gif) Thx, Turk |
r_towle |
Sep 16 2013, 09:28 AM
Post
#2
|
Custom Member Group: Members Posts: 24,591 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
Here is how I honestly do it.
Go to the hardware store and buy a few packs of rubber caps. Remove EVERY vacuum line from the plenum except the MPS. Car will start, run and idle properly setup like that. Then, test the intake tube hoses, clamp all of them with screw clamps if required, reseal the intake gaskets at the head, and check or redo the injector seals. Then, if you idle is still flaky, its not a vacuum leak...you need to look at TPS, timing, distributor, MPS, ECU, Temp sendors, or wiring. So, I remove all vacuum to start with to do a more systematic diagnostic of the idle... If once you get the system to idle, add ONE line at a time to check if that system is what is affecting the idle... So you Decel valve might do it... OR your AAR might do it. So plug only one in at a time, not both. Rich |
Lo-Fi Version | Time is now: 9th June 2024 - 07:27 PM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |