1999 SAAB 9-3 repair Question Car won't start

Tiny
JHIGSON
  • MEMBER
  • 1999 SAAB 9-3
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 75,000 MILES
My car was running fine. I parked it for an hour and now it will not start. All the fuses are good, I can smell gas so I don't think thats the issue. A friend thinks it might be the DICE computer under the dash, or possibly the TWICE(?) Computer under the drivers seat. We changed the computer under the dash on the passenger side. No luck. Any suggestions?
Friday, May 16th, 2008 AT 4:09 PM

6 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
I can smell gas so I don't think thats the issue. My question here is -Is it the correct fuel pressure-EFI system are very picky in its pressure.

Try doing below and see what happens

Get a carb cleaner and spray into the carb or the throttle body on an EFI. Did it start and die? If not disconnect a sparkplug wire or 2 and ground it to the engine -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel problem, check the fuel pressure to rule out the fuel pump/pressure regulator/filter and listen to the injector/s are they pulsing or hook up a noid light.

If both fuel and spark is present-check the valve and ignition timing, this will lead you to problems with compression and valves opening and closing at the wrong time
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Friday, May 16th, 2008 AT 4:23 PM
Tiny
JHIGSON
  • MEMBER
  • 4 POSTS
I disconnected the direct ignition and got no spark. I also put gas directly into the throttle body. No luck. That is why I think it may be a computer problem that is preventing the coil or plugs in the direct ignition from firing. Thanks for any help you can give me!
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Friday, May 16th, 2008 AT 8:02 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Might wanna double check the ignition discharge module before you replace the computer-
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Friday, May 16th, 2008 AT 11:23 PM
Tiny
JHIGSON
  • MEMBER
  • 4 POSTS
I'll try that first. Thanks alot
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Saturday, May 17th, 2008 AT 8:17 PM
Tiny
JHIGSON
  • MEMBER
  • 4 POSTS
Can you tell me where the ignition discharge module is located in my Saab?
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Wednesday, May 21st, 2008 AT 2:35 PM
Tiny
MNTHNY4
  • MECHANIC
  • 612 POSTS
Your car is fine just replace the engine crank shaft position sensor & you will be fine. If your twice was bad u would get a message on you sid display saying key not accepted & if your dice was bad your light & dash instrutments would not work
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Wednesday, June 11th, 2008 AT 9:08 PM

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