900ng 2.3 NA Manual Trans Weird Hot Start Problems - Any Ideas? - The Saab Link Forums

Go Back   The Saab Link Forums > Saab NG900 '94-'98 and 9-3 '99-'02 Forum > Car Problems? NG900 or old 9-3 Only

Car Problems? NG900 or old 9-3 Only If you're experiencing problems with your NG900 or 9-3, post your question in here. CEL Code or GTFO!

SaabLink.net is the premier Saab Forum on the internet. Registered Users do not see the above ads.
LinkBack Thread Tools
Old 08-28-2014, 04:59 PM   #1
Join Date: Oct 2012
Posts: 2
900ng 2.3 NA Manual Trans Weird Hot Start Problems - Any Ideas?

Quick Synopsis of what has been going on.

When the car is cold it starts as it should however after it has reached operating temperature it will turn over and fire up only to die after a few seconds. Exactly the same as if you disconnect the fuel pump it burns the fuel in the system.

I have fitted a new fuel pump (the old one always ran dry with at least 1/4 a tank of gas left - Turned out to be the label was floating around the gas tank)
The Fuel pressure regulator has been changed along with the relief valve.
The crank position sensor has also been replaced with no effect.

Today I noticed that if I sprayed wd 40 into the throttle body I could make it run long enough where it would stay running.

So I am presuming that something is switching off between the initial hot start crank where it fires up and is telling the ECU that it is not running so the ECU is either switching off the fuel pump or the injection system, maybe even both.

I am prepared to try another CPS but doubt that this would be the problem as I could bypass the issue by artificially feeding the engine until the ECU recognized it was running and kept it running.

I appreciate any suggestions to what might be causing this issue.

For further information this is a very well maintained 1996 2.3l N/A convertible, manual transmission which when it does start runs well. It does not stall or die once it is running and gets good fuel mileage.

I have read everywhere that this is always a bad CPS and accept that the new one could be faulty but do not know why it would start to work when fed fuel.

Thanks in anticipation,

john_m 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

Quick Reply

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:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Vehicle Info.
Enter your vehicle information (year, model, mods)
Please select your insurance company (Optional)


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 03:30 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.