Re: Help me understand MAF failure and long term fuel trim - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
Site News -
6/18 Reminder: Your Amazon.com Purchases Pay Saabnet! | 4/20 Small Batch Order: Saabnet.com T-Shirts!! Put in Your Order Now!!
[General |
Members |
C900 |
9000 |
NG900 & OG93 |
93 |
95 |
NG95 |
99 |
Sonett |
Vintage Models |
Performance |
Detail |
Clubs & SOC |
Other Cars |
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]
You dial in and look at air mass correlation value on the Tech 2. It is supposed to be +-0% and steady load. Some variations is allowed.
During steady acceleration, if the value drops into negative territory and slowly work its way down to 10-25% during that steady acceleration, the air mass meter is usually the culprit.
That same value is also good to use to spot vacuum leaks because it goes in to negative at idle when a hose is broken.
Or if someone have not seated the turbo intake pipe properly to turbo flange, that value goes in to positive territory.
Anders
SWEDECAR
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.
Scandinavian Import
 |
StateOfNine.com
 |
Swedish Dynamics
 |
SaabClub.com
 |
Jak Stoll Performance
 |

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!