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: '86-'87 C900 ig. amp. fix w/photo
Posted by Phoebe (more from Phoebe) on Tue, 19 Oct 2021 15:27:40
In Reply to: Re: '86-'87 C900 ig. amp. fix w/photo, Cmyles
[Profile/Gallery]
, Mon, 18 Oct 2021 12:50:37
Members do not see ads below this line. - Help Keep This Site Online - Signup
Thank you so much for your very detailed response!
From the electrical schematics in my bentley manual, in the '87 model the signal to the tach is branched between the tach and the computer- meaning it doesn't need to travel through the tach before it reaches the computer. If that were not the case, I'd have issues with the car running properly if the tach wasn't working, correct?- and the car runs fine even if the tach is not on. I could be wrong, but I've spent some time looking over the electrical schematics- I know they changed pretty considerably year by year.
I had redone and more firmly secured the connection of the Hall sensor at the distributor- that didn't seem to help the stalling. Ignition coil was good, all grounds fine.
I've done more tests and more thoroughly inspected everything- here's what I've found:
-plugged PCV valve
-vacuum leak to the charcoal canister
-high resistance from the idle control valve to the computer- should be 40ohms, its 60.
-loose ground on the ignition control module! there was a sheet metal screw through the inner fender that was loose
I'm waiting on a new PCV valve before I start it up again, but I will post an update to see if the loose ground was what was causing my problems. Fingers crossed.
posted by 129.170.194...
Posts in this Thread:
- random stalling, Phoebe, Sun, 17 Oct 2021 21:38:03
- Re: random stalling, Name Left Blank, Mon, 18 Oct 2021 14:54:21
- Re: random stalling, Dr fall, Mon, 18 Oct 2021 09:49:47
- Re: random stalling, Phoebe, Mon, 18 Oct 2021 09:23:56
- Re: random stalling, Roger D
, Mon, 18 Oct 2021 06:09:08
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!