Advice? '85 8 valve Sedan (Pokey) ressurection - The Saab Link Forums

Go Back   The Saab Link Forums > Welcome to The Saab Link > Events

Events This forum is for any events thats TSL members should know about. This is left open for all members.

SaabLink.net is the premier Saab Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools
Old 11-27-2019, 11:13 PM   #1
SAABeginner
 
Join Date: Nov 2019
Posts: 1
Advice? '85 8 valve Sedan (Pokey) ressurection

Hey everyone, I'm hoping someone can offer me some insight into a problem I have been running into with my '85 n/a 8 valve Saab 900s sedan. The vehicle was functioning until the air/fuel regulator gave out. (In the n/a air drawn from motor suction opens a valve that increases fuel flow to cylinders. For those unfamiliar) it has since been replaced. It seems now however that the fuel pressure is too high and won't run when the fuel pump is engaged. On residual pressure, without the fuel pump relay inserted, the motor runs perfectly normally. With the relay engaged however, a high pitched whine, which emanates from the fuel system, accompanied by a vibration I can feel in the injector lines when the pump relay is engaged, prevents the motor from turning over and running. There is an issue with part of my fuel system but I don't know what part it is yet. If anyone knows I would be greatly appreciative. This is my baby that I'm trying to bring back. I'm not ready to give up on this. I've had other Saabs but none were quite the same as Pokey. Any insight is greatly appreciated.
LSAABIO is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 12-11-2019, 02:22 PM   #2
SAABeginner
 
Join Date: Apr 2017
Posts: 4
Is this the Bosch CIS K-Jetronic? If so, I'd start by verifying all the fuel pressures around the fuel distributor. Does the car even try to start with the fuel pump running? Is it flooding? Are the injectors spraying even with the engine not running but the fuel pump on?
jimbab5 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Old 12-13-2019, 08:34 AM   #3
SAABeginner
 
Join Date: Jun 2007
Location: North Carolina
Posts: 13
There is a warmup regulator towards the front of the car close to the thermostat housing.
You can identify it by the two fuel lines going to it.
It serves to reduce the pressure on the pintle valve in the fuel distributor when the engine is cold allowing for a richer mixture. As the engine warms up, the electrical element heats to allow movement of the diaphragm inside which when moves on a bi-metal strip to reduce fuel pressure.
The value with a cold engine is usually around 65-75 PSI with the pump running. It drops to around 46-55 PSI when warmed up...depending on which regulator you have.
There is also a cold start injector at the throttle housing, which is driven from a signal off the thermo-time switch between the intake runners on your car.

Last edited by Saabjock; 12-13-2019 at 08:45 AM.
Saabjock is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the The Saab Link Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Vehicle Info.
Enter your vehicle information (year, model, mods)
Insurance
Please select your insurance company (Optional)

Log-in


Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -8. The time now is 05:23 PM.


Powered by vBulletin® Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Friendly URLs by vBSEO 3.5.2
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
All content is copyright The Saab Link and it's original authors.


 

Garage Plus vBulletin Plugins by Drive Thru Online, Inc.