The above is an advertisment. If it asks you to download software or create an account, please ignore it.
Site News - 6/4: Advertising Position/Commission Available | 5/10: Members: Log In to See Fewer Ads!
[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 | Post Followup ] Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
Re: Stalls when hitting gas while warming up
Like This Post: - Subscribe to Daily Digest for this Bulletin Board
Posted by Sean H (more from Sean H) on Mon, 11 Aug 2003 13:11:33 Share Post by Email
In Reply to: Re: Stalls when hitting gas while warming up, MIKEC, Mon, 11 Aug 2003 10:48:15
Alert me when someone posts in this thread:
Members do not see ads below this line. - Help Keep This Site Online - Signup

My first instinct would be to check the vacuum hoses. Sometimes I simply just replace them rather than looking for the leak as the leak itself could be very difficult to find. Also, it could be the vacuum pressure switch under the fuel filter. Another item is the cold start valve. This valve not only adds a burst of fuel during cold starting, but it rids the chamber of any potential vapor lock. This valve is set to add a quick burst of extra fuel when you attempt a hard acceleration. I do not recall which switch activates this, but I think it's a throttle switch on the throttle housing (someone correct me if I'm wrong).
If you have a Bentley manual there are a number of steps to go through in order to solve this problem. The most important thing is to start simple and cheap. Vacuum hoses are simple and cheap.
Another suggestion is to clean out the throttle housing thoroughly. Any crud on the throttle valve itself will cause some problems.
Lastly, a simple test is to pull out your injectors by unscrewing the hex bolt that is between each group of injectors. Put the injectors in a container that is safe for fuel. Then remove the rubber bellows from the air filter housing to the throttle housing. This will expose the air sensor plate. This plate has a small nut on top of it. With the fuel pump relay removed and a jumper in place use a pair of channel locks and pull up on the nut at the air flow sensor plate. This will allow fuel to be delivered to the injectors. Note the spray pattern They should all spray in a misting typ fashion. Bentley and Haynes manuals have good pictures of proper atomization and poor atomiztion. Make sure that you injectors have good atomiztion. If not, then the injector is dirty, clogged or bad (although, injectors rarley go bad).

I know this is long, but they're just a few quick ideas. I could be off base, but my impression is that it's the fuel system and not the ignition system, but the important thing to remember is that these two system work together. I can't imagine that if it's idling OK that anythink is wrong with the igition system though... Nonetheless, check you plug wires for proper connection and make sure they're in good condition. Replace if you have any doubts.

Good Luck.

posted by 207.224.69...
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 © 1988-2025 - 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!