[General | Members | C900 | 9000 | NG900 & OG93 | 92X | 93 | 95 | NG95 | 97X | 99 | Sonett | Vintage Models | Performance | Detail | Clubs & SOC | Other Cars | Books Movies & Music | Chat | FAQs | Gifts | Photos | Classifieds | Polls | Raffle | Sponsors]

Saab Model 99 Bulletin Board
1969-1984
Search:

[Main Saab Model 99 Bulletin Board | Post Followup | FAQ ] [ Prev by Date ] [ Next by Date ] Member Login / Signup [Most Recently Edited Saabnet.com Photo Galleries]
Re: 77 removing the Pulse Air System and others
Posted by Gary Stottler (more from Gary Stottler) on Thu, 3 May 2012 11:07:08
In Reply to: 77 removing the Pulse Air System and others, Stephen, Thu, 3 May 2012 09:19:13
Stephen,

I guess my first suggestion would be that if the 2 systems you mention are working, you might want to consider leaving them in place for a couple of reasons. First, they actually do work to reduce emissions/pollution. Second (for the EGR), you can run more spark advance with EGR and therefore possibly get better fuel economy.

The pulse air system is working if you hear the check valves "chattering" at low-mid rpm under light acceleration. The EGR is usually a matter of making sure all the vacuum hoses are tight and intact and then cleaning the valve and the orifice in the exhaust manifold per the service manual. The one thing that does go wrong with the EGR is the thermal switch in the cylinder head tends to fail closed. I just have mine bypassed with a double-ended nipple connected to the two hoses and all works fine.

So, originality, cleaner air, and better mileage - what more could you want?

Just 2 cents....

If you do decide to remove them I'll take the parts off your hands as spares. Should just be a matter of capping the ports in the exhaust manifold (for both systems) and putting a plate over the EGR valve mounting. Then just cap off all the vacuum ports and you should be able to mechanically remove all the stuff.

Good Luck!

Gary

posted by 198.208.15...
Posts in this Thread:
Members can receive an alert when someone posts in this thread.
Post a Followup

Name:
E-Mail: (Confidential & Secure - Not revealed to other users!)
Send me email when someone posts in this thread: (available to Members)

Subject:

Posting rules are simple - No for sale/wanted ads or live auctions may be here - use the classifieds.
You may not cross-post your message to multiple BBs.
Personal attacks, insults, or flaming are not allowed.
Posting any of this will result in an immediate loss of posting privileges on this site.
Site Members do not see any warning (red) text.

Message:

Optional Link URL: (e.g. http://www.saabnet.com/)
To promote your own Saab site here, you must have a link back to The Saab Network.
Link Title:
Optional Image URL: (e.g. http://www.saabnet.com/img.jpg)


The content on this site may not be republished without permission. Copyright © 1988-2012 - The Saab Network - saabnet.com.
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 Donations
Your address is: 50.19.155.235 - Using CCBot/2.0 - Logged.
Site Members do not see red text instructions, green links, and bottom of the page banners.
Click here to see all the Site Membership Benefits!