Re: Fuel Pump testing to see whats wrong.. - Saab 900 Bulletin Board - Saabnet.com
Click Banner for Details on this Saabnet.com Classified
The banner above is an advertisment - if it asks you to download software, please ignore.
Site News - 7/1: Members: Log In to See Fewer Ads! | 5/28: SAAB Evolutions/TSN T-Shirts $14
[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]

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 | BBFAQ | Prev by Date | Next by Date | Post Followup ] Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
Re: Fuel Pump testing to see whats wrong..
Like This Post: - Subscribe to Daily Digest for this Bulletin Board
Posted by Ray in NC (more from Ray in NC) on Thu, 3 Jan 2002 18:31:55 Share Post by Email
In Reply to: Fuel Pump testing to see whats wrong.., Frodoe, Thu, 3 Jan 2002 17:25:19
Alert me when someone posts in this thread:
Members do not see ads below this line. - Help Keep This Site Online - Signup

If jumpering the relay didn't cause pump to run, next step would be to check for voltage to relay. With relay removed and ignition on, you should have power at terminal 86. If so, the fuel injection main relay and wiring to relay is OK. Then, crank the starter -- you should have voltage between pins 86 and 85. If so, you have a signal from the LH control unit. Put in relay and crank starter. You should hear relay click, indicating it is closing.

Now, check for voltage at the pump. Remove the access cover in the floor of luggage compartment. With relay in place and engine off, ignition in START, you should have 11.5 volts at pump. If no voltage, problem is an open circuit. Check wire between pump and relay and check ground wire from pump to center of trunk. If you have voltage and pump doesn't run, it needs replacing.

Depending on model year you have roller type or rotor type pump. The roller type has a supply pump; the rotor type doesn't. You can test the supply pump to see if fuel comes out of the relief valve, but you'll have to run the fuel pump. If it won't run, I don't think you can test the supply pump.

If you don't want to spend the $$ on a new pump, find one at a junkyard from a model with not too many miles on it. Test the pump (connect a battery to it) to be sure it runs. You'll have to remove and install the pump yourself, but hey, that's part of saving money!

Good luck.

posted by 65.56.16...

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!