 How to check for vacuum leaks, What are the tips and tricks ? |
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| 913B |
 Oct 31 2014, 06:15 PM
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#1
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Senior Member  Group: Members Posts: 856 Joined: 25-April 05 From: South Bay/SoCal Member No.: 3,983 Region Association: None  |
From the last time I tried with the engine running and spraying carb cleaner everywhere and causing a big mess. I did not really see a big RPM difference, maybe I was doing it wrong, maybe I was expecting too big a change and moved on too quickly, but nothing really came from it. I still suffer from a periodic hi idle (1500 rpm), sometimes it idles fine at 800. If it was a vacuum leak why did it correct itself and sometimes idle at 800 ? I have since removed the AAR and even swapped out the MPS with another one, no difference. Stock 1.7 FI
So the discussion for today is what is the proper method, tips and tricks to perform a good vacuum leak check. I am tempted to make a DIY homemade smoke machine from watching youtube to blow smoke in my FI system and check it that way ?? Thoughts (IMG:style_emoticons/default/popcorn[1].gif) (IMG:style_emoticons/default/popcorn[1].gif) |
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| r_towle |
Nov 1 2014, 08:54 AM
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#2
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Custom Member Group: Members Posts: 24,705 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States 
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Go back to the issue.
A periodic high idle , in my opinion, is not a vacuum leak. I would look at cleaning your distributor advance plates and regreasing them. |
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| EdwardBlume |
Nov 1 2014, 09:00 AM
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#3
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914 Wizard Group: Members Posts: 12,338 Joined: 2-January 03 From: SLO Member No.: 81 Region Association: Central California
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QUOTE(r_towle @ Nov 1 2014, 07:54 AM)  Go back to the issue. A periodic high idle , in my opinion, is not a vacuum leak. I would look at cleaning your distributor advance plates and regreasing them. (IMG:style_emoticons/default/thisthreadisworthlesswithoutpics.gif) I have this problem. Idle pops up to 1200 or so occasionally and intermittently. |
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Posts in this topic
porsche913b_sp How to check for vacuum leaks Oct 31 2014, 06:15 PM
02loftsmoor
From the last time I tried with the engine runnin... Oct 31 2014, 06:25 PM bdstone914 I have not tried it but using a non lite propane t... Oct 31 2014, 06:47 PM 76-914 or a spray with water and look for an idle drop. Oct 31 2014, 07:03 PM porsche913b_sp I was thinking of something similiar to this with ... Oct 31 2014, 07:46 PM Jeff Bowlsby How a bout a smoke pen? a vacuum leak would visib... Oct 31 2014, 08:35 PM Chris Pincetich :toke:
:rolleyes:
:beer2: Oct 31 2014, 11:08 PM a few loose screws As far as the combustible methods go, personally I... Nov 1 2014, 03:57 AM cary I built a smoke generator out of a paint bucket. I... Nov 1 2014, 08:52 AM
porsche913b_sp
I built a smoke generator out of a paint bucket. ... Nov 1 2014, 11:51 AM porsche913b_sp
Go back to the issue.
A periodic high idle , in m... Nov 1 2014, 11:54 AM boxsterfan My idle problems went away with a new CHT and spac... Nov 1 2014, 11:16 PM BeatNavy
My idle problems went away with a new CHT and spa... Nov 2 2014, 05:30 AM porsche913b_sp whats the spacer ? Nov 2 2014, 12:11 AM Porschef An adapter essentially that goes between the CHT s... Nov 2 2014, 05:10 AM |
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