D jet fuel pressure - Saab Saab Model 99 Bulletin Board - Saabnet.com
The banner above is an advertisment - if it asks you to download software, please ignore.
Site News - 4/9 Saab Owners' Convention Day Pass Raffle | 3/26 M Car Covers (by State of Nine)
[General | Members | C900 | 9000 | NG900 & OG93 | 93 | 95 | NG95 | 99 | Sonett | Vintage Models | Clubs | Other Cars | FAQs | Gifts | Member Photo Galleries | Member Directory | Classifieds | Manuals | *Buddy Registry | *Mileage Registry | Polls | What's New | Raffle | Photo of the Month | Sponsors]

Saab Model 99 Bulletin Board
1969-1984 [Subscribe to Daily Digest]
(Search Author's Posts: e.g. Keyword:username)*Members Only

[Main Saab Model 99 Bulletin Board | BBFAQ | Prev by Date | Next by Date | Post Followup ] Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
D jet fuel pressure
Like This Post: - Subscribe to Daily Digest for this Bulletin Board
Posted by Kari (more from Kari) on Wed, 5 Nov 2014 18:13:37 Share Post by Email
Alert me when someone posts in this thread:
Members do not see ads below this line. - Help Keep This Site Online - Signup


Greeting Saabers

The 74 has a hard hard time starting-also was fouling plugs quickly. Running rich/ black plugs after a few minutes. and even black soot at the tailpipe.

So, attached a fuel pressure gauge, cleaned the plugs and fired it. Would not fire unless the throttle was open slightly.

With simply the temporary fuel pump feature (when key is turned to ignition) engine not started- the gauge advanced at twenty- then slowly goes down to 10psi. I turned the key off and on again(for a second hit from the fuel pump) and the gauge advanced to 20 immediately. After cranking it for a moment, and opening the throttle, the engine fired and ran- the fuel gauge now at a consistent 30psi.

The exhaust stunk(running rich) I then adjusted the fuel pressure regulator to 28psi- and the engine began to idle smoother.

Upon turning the car off, the fuel pressure gauge shot down to 20 quickly- then to ten psi a moment later- ultimately going down to 2 psi a few minutes later.

I tried to start the engine again-even giving it the boosts from the fuel pump, prior to firing it, and it will not start. I then packed up.

Question, what is the normal fuel pressure amount for djet, after shutting off engine? Should it not hold the pressure- if so what psi? The gauge not is at 2psi. If I turned the key to ignition, the fuel gauge immediatly shoots to 20psi, and after starting- remains at a constant 28psi.

What are the proper reading amounts for when engine is off, and also after the boost when ignition on? How quickly should the pressure decrease?

Thanks for any help.

I have the gauge hooked up between the fuel rail and the fuel pressure gauge as the service manual indicated.


posted by 107.55.3...

Posts in this Thread:
Alert me when someone posts in this thread:
Members do not see ads below this line. - Help Keep This Site Online - Signup
Post a Followup

No Site Registration is Required to Post - Site Membership is optional (Member Features List), but helps to keep the site online
for all Saabers. If the site helps you, please consider helping the site by becoming a member.

Name: Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
E-Mail: (Optional)
Re-Enter E-Mail: (Confidential & Secure - Not revealed to other users!)
Note: Please check your spam folder for BB responses.

Subject:

Posting rules are simple - No for sale/wanted ads may be posted here - use the site classifieds.
You may not cross-post your message to multiple BBs.
Not permitted: political/religious topics and being disrespectful (personal attacks, insults, etc...).
 Site Members do not see any red text, inline ad links, bottom of page anchor ads, box ads, or anti-spam check.

Message: (please no for sale/wanted classifieds - post those in the Saabnet.com Classifieds)
Links are now automatically made active, no need for any special code (or use the Option Link field below) - don't put links in () or end with a '.'
To add inline images to your post, use [img]http://www.domain.com/img.jpg[endimg] (or use the Optional Image Link field below).

Links are now automatically made active, no need for any special code (or use the Option Link field below) - don't put links in () or end with a '.'
To add inline images to your post above, use [img]http://www.domain.com/img.jpg[endimg] (or use the Optional Image Link field below).
Optional Link: (e.g. http://www.saabnet.com/)
Link Title: (Optional)
Optional Photo/Image Link: (e.g. http://www.saabnet.com/img.jpg)
Photo/Image to Upload: (Please be patient while file uploads)



StateOfNine.com
SaabClub.com
Jak Stoll Performance
M Car Covers
Ad Available

The content on this site may not be republished without permission. Copyright © 1988-2024 - The Saab Network - saabnet.com.
For usage guidelines, see the Mission & Privacy Notice.
[Contact | Site Map | Saabnet.com on Facebook | Saabnet.com on Twitter | Shop Amazon via TSN | Site Donations]

Random Saabnet.com Member Gallery Photos (Click Image)
This is a moderated bulletin board - Posting is a privilege, not a right. Unsolicited commercial postings are not allowed (no spam). Please, no For Sale or Wanted postings, SERIOUSLY. Classifieds are to be listed in The Saab Network Classifieds pages. This is a problem solving forum for over 250,000 Saab owners, so expect to see problems discussed here even though our cars are generally very reliable. This is not an anything goes type of forum. Saabnet.com has been a moderated forum since 1988. For usage guidelines, see the Saabnet.com Mission and Purpose Page. Please remember that you are not anonymous. Site Contact | Site Donations | Other Sites by SP - Poverty2Prosperity.org | Run Club Menlo Park | ScreenBot


Site Members do not see red text instructions, bottom of the page anchor ads, or box ads.
Click here to see all the Site Membership Benefits!