Re: The 02 system vs. no 02 system. - Bulletin Board

[General | Members | C900 | 9000 | NG900 & OG93 | 93 | 95 | NG95 | 99 | Sonett | Vintage Models | Performance | Detail | Clubs & SOC | Other Cars | Books Movies & Music | Chat | 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]

Saab Model 99 Bulletin Board
(Search Author's Posts: e.g. Keyword:Author)*Members Only

[Main Saab Model 99 Bulletin Board | Post Followup | BBFAQ ] [ Prev by Date ] [ Next by Date ] Member Login / Signup [Most Recently Edited Photo Galleries]
Re: The 02 system vs. no 02 system.
Posted by boot_sequence [Email] (#178) [Profile/Gallery] (more from boot_sequence) on Tue, 20 Mar 2018 20:14:08

In Reply to: Re: The 02 system vs. no 02 system., Slyde, Tue, 20 Mar 2018 04:35:16
Alert me when someone posts in this thread:

my 99 is '78 turbo. the book is for thru '80
the system check for the lambda is very comprehensive and if you like I can photo copy the section outlining how to trouble shoot.
one nice thing was that the wide open throttle switch can be found just about anywhere, I unscrewed mine and used the housing for the new guts.
the next key piece is a frequency valve that is an injector with some wiring connected to it. after that its the o2 sensor and the box/brain. its really easy to work on so long as you have that book!
mice nests are a pain but if you keep this original you wont be disappointed.. if you make it a sleeper you wont regret it!

the CIS parts were tricky for me to diagnose at first because I had no idea what I was doing. the first thing to do is find out WHEN the fuel passes thru the metering plate, pull an injector and put it in a plastic bottle , run the pump and pull on the metering plate. the screw should be adjusted so that you get fuel out of the injector right as the plate lifts. from there you can tune with a sniffer (if you want to)
I had to replace all injectors and seals.
I rebuilt the warm up regulator with some inspiration from the Porsche 928 guys and their simple to understand walk through and video. now that I own a fuel pressure gauge kit it was super easy to understand how the work I put into it affected the WUR and saved me big money (basically opened, cleaned with W-D 40 rust remover and replaced all screws)
now I have a car that has correct fuel pressure, cold and warm and works like it was designed.

other inspiration goes out to Gary Stottler, he has helped a lot. please search his posts, you will see what I mean!

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 [Most Recently Edited Photo Galleries]
E-Mail: (Optional)
Re-Enter E-Mail: (Confidential & Secure - Not revealed to other users!)
Note: Please check your spam folder for BB responses.
If you use GMail, follow these instructions from Google so that they appear in your regular inbox.


Posting rules are simple - No for sale/wanted ads or live auctions may be here - use the classifieds.
You may not cross-post your message to multiple BBs.
Personal attacks, insults, or flaming are not allowed.
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 TSN Classifieds)
To add inline links to your post, use [link][endlink] or use the Optional fields below.
To add inline images to your post, use [img][endimg] or use the Optional Image Link field below.

Optional Link: (e.g.
To promote your own Saab site here, you must have a link back to The Saab Network.
Link Title: (Optional)
Optional Image Link: (e.g.

The content on this site may not be republished without permission. Copyright © 1988-2018 - The Saab Network -
For usage guidelines, see the Mission and Purpose Page.
[Contact | Site Map | on Facebook | 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. has been a moderated forum since 1988. For usage guidelines, see the Mission and Purpose Page. Please remember that you are not anonymous. Site Contact | Site Donations | Other Sites by SP -
Your address is: - Using CCBot/2.0 ( - 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!