Lean mixture?weak fuel pump?(long) - Saab 900 Bulletin Board - Saabnet.com
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 | Post Followup ] Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
Lean mixture?weak fuel pump?(long)
Like This Post: - Subscribe to Daily Digest for this Bulletin Board
Posted by Frank Myers [Email] (more from Frank Myers) on Wed, 18 Mar 2009 05:33:34 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

About 5 months ago after buying a new to me 1990 sedan 2.1 five speed, I began solving issues. One that surfaced seemed to be a bad fuel pump. Engine would not start. I could not hear the fuel pump. I replaced the fuel filter, and used a donor used fuel pump, housing complete from my 1994 900 T vert. Well When test driving it and at other times well seldom used, it would buck and hesitate when warm. well I let it sit about 4 months (starting it and letting ti run about 1 =X a week. I had the 92 hatch back which ran as a dauily driver until about 2-3 weeks ago when the head gasket went. Sooo I started using the sedan. The bucking problem seemed fixed for the time I have been driving it, but the weather has been cold. Now the past 2 days weather is warm and car is now bucking again when heated up or when outside temp is "warm" Last evening it was about 70 outside and the engine started it's bucking on way home. I looked at some things like coil and plugs. Plugs very clean/white so mixture is lean. This a.m on way to work waether is cooler and no bucking. Heres what I think, but I need your input. 1. I can hear the fuel pump but the time I did a fuel flow check the output seemed very scare. I have read on this site that if the fuel pump is strong enough to start the engine it is OK. 2. The 94 used pump was weak or no good, and that the mixture is very lean due to low fuel delivery and the warmer air leans it to a poor mixture so it is not burning properly. I have considered getting another new pump, but I am having problems finding the proper pump as the 90 2.1 seems to be a transition year. One pump I bought new was too large for the original pump housing. I guess I should be looking for a 93-94 pump to put in the 94 housing. I know the fuel pressure (whats it called) is diffgerent for the 2.1 than the 2.0 T.Where can fuel be richened? Thanks in advance for all I am about to receive. oh Lord.

posted by 170.185.14...


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!