Porsche Enthusiasts Club Forum

It is currently Thu Mar 28, 2024 10:42 am
Classic Line Insurance


All times are UTC [ DST ]




Post new topic Reply to topic  [ 4 posts ] 
Author Message
 Post subject: How do I Test the fuel pressure damper?
PostPosted: Sun Jan 16, 2022 10:04 pm 
Offline
User avatar

Joined: Thu Mar 26, 2020 9:03 am
Posts: 36
TIPEC membership: 0
Hi all May I get some help please.
1986 normally aspirated 944. Going through one of those starts then stops phase. I’ve changed due relay etc. just looking at the fuel pressure damper on front of fuel rail. If I remove the vacuumed hose and suck on it, it responds but slowly the vacuum I’ve created releases. should it hold that vacuum until I release it??
thanks in advance.
bremar.


Top
 Profile  
Reply with quote  
 Post subject: Re: How do I Test the fuel pressure damper?
PostPosted: Mon Jan 17, 2022 7:51 pm 
Offline

Joined: Tue Nov 06, 2007 12:22 am
Posts: 1468
Location: Stratford-upon-Avon
TIPEC membership: 4635
Should hold vacuum. If diaphragm failed then you should also be able to suck fuel from vacuum port, so use clear hose on MityVac to spot this.

_________________
928 S4 Amazon Green 91MY


Top
 Profile  
Reply with quote  
 Post subject: Re: How do I Test the fuel pressure damper?
PostPosted: Tue Jul 05, 2022 1:59 pm 
Offline

Joined: Tue Jul 05, 2022 1:39 pm
Posts: 6
TIPEC membership: 0
did you get sorted?


Top
 Profile  
Reply with quote  
 Post subject: Re: How do I Test the fuel pressure damper?
PostPosted: Wed Jul 06, 2022 6:48 pm 
Offline

Joined: Sat May 28, 2011 10:17 pm
Posts: 271
Location: Worcestershire
TIPEC membership: 0
BrettandSam wrote:
Hi all May I get some help please.
1986 normally aspirated 944. Going through one of those starts then stops phase. I’ve changed due relay etc. just looking at the fuel pressure damper on front of fuel rail. If I remove the vacuumed hose and suck on it, it responds but slowly the vacuum I’ve created releases. should it hold that vacuum until I release it??
thanks in advance.
bremar.


Have you checked fuel pressure and performed a leak down test etc?

As others said pretty easy to spot if the FPR or damper is busted as you will get fuel in the vacuum line.

Not sure that a dodgy damper would cause an issue as I've known some people delete the damper, more likely the FPR or fuel pump?


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 4 posts ] 

All times are UTC [ DST ]


Who is online

Users browsing this forum: Bing [Bot] and 22 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group