Click Banner for Details on this Saabnet.com Classified
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]
[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: 1982 900 Turbo fast idle
Posted by MS (more from MS) on Tue, 5 Mar 2002 18:53:36
In Reply to: Re: 1982 900 Turbo fast idle, HH, Tue, 5 Mar 2002 08:53:16
Members do not see ads below this line. - Help Keep This Site Online - Signup
Well, on the large valve cover hose issue - it connects to the air filter box just under the "lip" where there's a plastic nipple of an appropriate diameter so that hose slips right onto it. Once inside the filter box it makes a 90 bend down the center of the filter where crankcase blow by gases are routed back into the engine for combustion. That plastic fitting may have been pushed inside the filter box, or someone removed it. It's not a vacuum leak, but more of an emissions issue.
Now about that smaller hose - Do you have the turbo APC system? I know that it was introduced for the later 82 models such as on my car, but not on the previous 79 - 82 cars. With the APC system, that smaller manifold hose connects to an APC component that monitors intake boost pressure. I do know that with the non-aspirated 900's, that hose connects to where you say yours is connected. And on the non-APC turbo system, I can understand a check valve being necessary to keep boost from venting into the valve cover. Come to think of it, that may be your main vacuum leak right there! Even with a check valve to check boost, with that set-up there's nothing to keep extra air from being drawn into the intake manifold, even if the large diameter hose was connected properly to the air filter box. Plug that smaller hose and see if there's an immediate idle improvement. May have to reset your idle if that was tampered with.
Regarding an ECU - if you have a pulse modulated CIS injection system, temp and O2 sensors, you need an ECU. Even if it does very little by comparison with later models. Yours should be beneath the rear seat on the right hand side.
posted by 152.163.20...
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.
StateOfNine.com
![](/tsn/xyz/stateofninebutton.gif) |
SaabClub.com
![](/tsn/xyz/scnabutton.gif) |
Jak Stoll Performance
![](/tsn/xyz/jakstollbutton.gif) |
M Car Covers
![](/tsn/xyz/mcarcoversbutton.gif) |
Ad Available
![](/tsn/xyz/buttonavailable.gif) |
![](/tsn/images/tsnmap.gif)
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!