sudden death diagnostic q's - Saab 900 Bulletin Board - Saabnet.com
The banner above is an advertisment - if it asks you to download software, please ignore.
Site News -
[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
sudden death diagnostic q's
Like This Post: - Subscribe to Daily Digest for this Bulletin Board
Posted by davnport [Email] (more from davnport) on Mon, 4 Aug 2008 13:18:43 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

I've spent most of the day screwing around with my '91 900T conv. after having it towed home yesterday. I'll spare you all the bloody details; I now know how the knee bolster comes out (and not yet how the trunk floor section that covers fuel pump access is removed!!) But now here's what I've found.
1. If I jumper fuse position 30 to +12v. the car will start and run normally (at idle, haven't tried to drive it).

2. I've inspected the relays by the ECU and they test ok, continuity thru coil, wipe on the contacts, etc. How one can get access to test if signal is there and if relay actually picks I haven't figured out yet.

3. I just re-read this from the Saabmaster site:

# Injector Signal While Cranking Pull back the rubber boot to an injector connector. Measure across both wires there with a voltmeter while cranking the engine. Voltage will vary according to engine temperature, ranging from 1V when cold to 0.3V when at operating temperature. If the voltage is present across the injector, look back at the fuel flow/level and the spark, the ECU and its relays are working as they should. If not, continue on below.

Does the 'ECU and its relays are working' part refer to the fuel pump and fuel system relays? I've done this and the next step in 'NO START CHECKS 2.4 LH' at the Saabmaster site. Both steps check out. What does 'look back at the fuel flow/level and the spark' mean? I clearly have spark and about 1/2 tank of gas.

4. In conclusion: I'm not sure I understand what I have discovered.
Using the jumper tells me the fuel pump is good, and must mean that it's not being told to run. Tests done say it should work. Where to next?
(Oh and about that trunk floor?)
'Preciate it,
Carl Davenport

posted by 71.192.133...

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!