Hello Mr. Scotty, I'm at a loss and not sure what to do at this point. Any advice you have would be GREATLY appreciated. I bought this 2007 Saab 9-3 2.0 turbo 2 door convertible about 6 months ago from a private seller(not a dealership). At this point in time it has 223,000 miles. I have P0300 showing right now but before I had P1312. I have replaced the upstream 02 sensor with a new OEM sensor, changed the sparks plugs, put new OEM coil packs in, and lastly I have put new OEM fuel injectors in. After I put the new injectors in the P1312 code went away, but the car is now running worse. You can physically feel the car shaking when its cold and not at operating temp, you can hear it running worse too, and I now have P0300.
Thanks again. 🙂
Well, it has an internal fuel filter in the fuel tank. I would have to drop the tank. but its something I'm working on figuring out how to do.
Have you been able to capture any live data to see what's going on? It would probably be a good idea to do a compression test on the engine to verify that it's OK internally. Do you have access to a factory scan tool (Tech2)? Although I've owned and worked on Saabs for a long time, those 2nd-generation 9-3s have the GM global 4-cylinder engine rather than the old Triumph-based mill and I'm not familiar with those.
no I have not done a compression test. ill go ahead and get on doing that. I do not have a tech II yet, but I am saving up too buy one because I know I do need it. thank you for the advice. that's something I would no have thought to do
Have you checked the fuel pressure and changed the fuel filter? With that many miles, I'd suspect a weak fuel delivery system causing the random misfire code.
no I have not done a compression test. ill go ahead and get on doing that. I do not have a tech II yet, but I am saving up too buy one because I know I do need it. thank you for the advice. that's something I would no have thought to do
I would definitely do a compression test just to make sure the engine is OK inside.
You definitely need a Tech2 to work on those, more so than earlier Saab models. I have a Chinese-made clone that works well.
However, for your car you will also need a laptop running a 32-bit version of Microsoft Windows (XP works well) and a serial port to connect the Tech2. A real hardware serial port is preferable but there are some USB to serial converters that are supposed to work. (I use an old Dell laptop with a serial port.) On that you would run the TIS2000 or GlobalTIS application software which grants security access to the car's systems and adds capabilities to the Tech2. (Remember, the Tech2 is klutzy early 1990s technology!) Here are some resources:
https://www.saabcentral.com/forums/tech-ii-workshop.146/
I forgot to mention that the Saab Club of North America provides the Saab WIS (Workshop Information System) online, which is the procedures database the dealers used and mechanics still use. No membership is needed to access it. Possibly you might find some helpful info there:
The Saab EPC (Electronic Parts Catalog) is also available online:
Saab-specific forums are a good source of information and help:
https://www.saabnet.com/tsn/bb/9-3/
https://www.saabcentral.com/forums/9-3-sedan-cabrio-04-combi-9-3x-workshop.30/