Re: Diagnosing 85T Base Boost - Saab 900 Bulletin Board - Saabnet.com
The banner above is an advertisment - if it asks you to download software, please ignore.
Site News -
[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
Re: Diagnosing 85T Base Boost
Like This Post: - Subscribe to Daily Digest for this Bulletin Board
Posted by SWEDISH DYNAMICS [Email] (more from SWEDISH DYNAMICS) on Sat, 2 Jun 2007 13:29:03 Share Post by Email
In Reply to: Diagnosing 85T Base Boost, Boffo, Fri, 1 Jun 2007 17:53:31
Alert me when someone posts in this thread:
Members do not see ads below this line. - Help Keep This Site Online - Signup

Boffo,
Hope all's well!
The 1985 APC system will need all proper signal inputs to properly function and create APC controlled boost pressures. The BCV (boost control valve on rad. support) is also a common culprit so you might consider replacing with a known good BCV to troubleshoot. We find that even when the BCV can be heard, the valve mechan. may be faulty and cleaning the internals with WD40 or similar could be helpful. The valve can also be tested by applying 12V accross the two pole terminals of the BCV. This should change the ability to blow through the hose connected to the "W" (wastegate actuator hose) on the BCV.
Also check all plug wires and make certain that these are the OEM "Bougicord" or a Magnecor wire set as aftermarket wires can create EMI at the hall effect and limit APC to base boost.
If all checks, you might consider an isolation test wherein you would disconnect the hose at the wastegate actuator and plug the open end of this hose. Take the car for a quick test drive (do not attempt this test for any extended period) and look for changes in charge pressures. If turbocharger and engine are capable, charge pressures should easily pass mid red to end red on boost gauge. If test shows no change in boost pressures, a problem with the engine or turbocharger is likely.
Best of luck and regards,
GaryK at SWEDISH DYNAMICS,INC.

http://swedishdynamics.saabnet.com

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!