I have a 1988 Saab 9000, there's a hissing sound while idling and it disappears when I apply moderate acceleration but comes back really loudly when the boost would have kicked in. I can't really tell whether there is any boost when I step hard on the gas, but the needle on the turbo gauge never budges from the line between the white (or green) and yellow regions.
The hissing comes from the intake manifold, and I think it's right at the wye connection to the intake. The hose clamps onto a plastic tube which then plugs into the manifold, I'm not sure how tight the connection is and whether it might be a gasket problem or something like that. I've checked the connections under the dashboard and at the hooter valve, they seem secure and the lines look fine, but the noise seems to come straight from the intake manifold.
posted by 67.159.8...
Posts in this Thread:
Post a Followup
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 |
Your address is: 18.104.22.168 - Using CCBot/2.0 (http://commoncrawl.org/faq/) - Logged.
Site Members do not see red text instructions, skyscraper, nor box ads.
Click here to see all
the Site Membership Benefits!