What year? what motor? - Saab 900 Bulletin Board - Saabnet.com
Click Banner for Details on this Saabnet.com Classified

[General | Members | C900 | 9000 | NG900 & OG93 | 93 | 95 | NG95 | 99 | Sonett | Vintage Models | Performance | Detail | Clubs & SOC | Other Cars | FAQs | Gifts | Member Photo Galleries | Member Directory | Classifieds | Service/Mechs | Manuals | *Buddy Registry | *Mileage Registry | Polls | What's New | Raffle | Photo of the Month | Sponsors]

C900 Bulletin Board
1979-1993 & 94 Conv [Subscribe to Daily Digest]
(Search Author's Posts: e.g. Keyword:username)*Members Only

[Main C900 Bulletin Board | Post Followup | BBFAQ ] [ Prev by Date ] [ Next by Date ] Member Login / Signup [Latest Member Gallery Photos]
What year? what motor?
Like This Post:
Posted by Larry West [Email] (#1140) [Profile/Gallery] (more from Larry West) on Tue, 7 Jul 2009 18:53:00 Share Post by Email
In Reply to: Out of Gas at 15L on the Fuel Gauge. :-(, canada karl [Profile/Gallery] , Tue, 7 Jul 2009 04:01:00
Alert me when someone posts in this thread:

All this can help pinpoint the problem. Someone mentioned the pre-pump, but 8v cars didn't get them, and the actual electrical pre-pump only lasted a few years, replaced by venturi pumps, which are a whole different beast.

But if your car is a 16v made before 1990, you should have the electrical pre-pump. Those can go bad.

What the pre-pump does is fill a small "bucket" in the tank. The main pump draws fuel from this bucket. What this does is it keeps the main pump drawing fuel while you may be maneuvering, particularly on left turns. Low fuel levels in an 8v car would cause the motor to cut out completely in a hard left because they didn't have the pre-pump & bucket.

If the pre-pump fails, what can happen is it stops filling the bucket. If the bucket is sufficiently sealed (most are), once the fuel level gets down to 1/3 to 1/4, the pre-pump is no longer filling the bucket, and the main pump draws all the fuel out, and eventually the motor stops.

In 1990 or so, Saab removed the electrical pre-pump, and filled the bucket using a venturi pump operating off the fuel supply pressure. A little after that, they switched to running the venturi pump off of the fuel return.
_______________________________________
Current:
2002 9-5 Aero Kombi Cosmic Blue
2000 9-5 SE sedan, Imola Red
1990 900S Rose Quartz, Auto
Past:
1999 9-5 LPT Combi
1999 9-5 LPT sedan
2002 9-5 Arc
1990 900 5-speed
1986 900 turbo Convertible
1991 9000 turbo
1980 99 GLi
1986 900 turbo
1986 900 S
1991 900 turbo
1984 900 turbo
1976 99 GL
Posts in this Thread:
Alert me when someone posts in this thread:
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 [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: [Member Only Feature] - Sign Up



The content on this site may not be republished without permission. Copyright © 1988-2020 - The Saab Network - saabnet.com.
For usage guidelines, see the Saabnet.com Mission and Purpose Page.
[Contact | Site Map | Saabnet.com on Facebook | Saabnet.com on Twitter | Shop Amazon via TSN | Site Donations]
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
Your address is: 18.206.187.81 - Using CCBot/2.0 (https://commoncrawl.org/faq/) - Logged.


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!