1988 8 valve bizarre cold startup, like it's starved for fuel - Saab 900 Bulletin Board - Saabnet.com
The banner above is an advertisment - if it asks you to download software, please ignore.
Site News - 3/26 M Car Covers (by State of Nine) | 12/12 Make Amazon Pay Saabnet!

[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
1988 8 valve bizarre cold startup, like it's starved for fuel
Like This Post: - Subscribe to Daily Digest for this Bulletin Board
Posted by Marko [Email] (more from Marko) on Sat, 13 Oct 2018 04:11:36 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

My 1988 8 valve has developed a bizarre startup issue. When it is cold, or even if it sits for 15 minutes but is warm, it will start but choke like it's not getting enough fuel. It will kind of acts like it's running on 3 cylinders and then smooths out when you give it gas when starting. Have to hold the accelerator down 1/2 while starting to make sure it starts. If you don't give it gas when starting, you will have to crank for a long time to get it to finally fire up. It has a new warm up regulator, cold start valve, new plugs and wires, new thermostat, both fuel pumps less than 2 years old. All OEM or NOS Saab. (I'm a fanatic about this) Head gasket done last year. I have every thermo time switch for this car and have swapped out all with spares and tested the cold/hot open/closed values. These all check out.

I am suspecting the fuel distributor. I only have this problem when starting. Once the car is running, any 8 valve guy would be amazed at how smooth it run. Accelerates beautifully, idles perfectly at 850 - 1000 RPMs. Great fuel mileage.

The fuel distributor was rebuilt about ten years ago.

The strange thing is it will start up again when warm with no effort at all. But if you leave it sit, after 20 minutes or so, it will get progressively more difficult and have the missing one cylinder syndrome.

I also have four matched sets of injectors for this car, and, all four sets exhibit the same issue.

One thing I noticed lately: the vacuum bottle/tank doesn't seem to hold pressure anymore. The vents only open/close once the car is running.

Do I need a functioning vacuum bottle? What are the symptoms of a bad vacuum bottle?

Someone, throw me a bone. Or a solution.

I've had this car for twenty years.

thanks

Mark

posted by 24.118.52...


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!