Saab 9-5 rough idle on startups

[Alexander]

Hello,

I have a problem with my Saab 9-5 2.3 2002 Aero during startup that I cant seem to figure out and would appreciate any help that I could get solving this.
At some startups, mostly cold start when I start her up the RPM needle goes up and down. It jumps between 1000-1400 for a few seconds and then settles.

When this type of startup happends the whole car is shaking and vibrating. I have OpenSID installed on my car so I can see if the car registers any missfires but it dont register any missfire.

The only code I have recieved from it is P0340 which say camshaft position sensor faulty. But my car dont have one and if I look at SAAB WIS it says the code is caused by bad spark plugs. But the plugs are brand new, correct type.

The things I have replaced is:

DI-Casette
Valve cover gasket
Spark plugs
Changed most of the vacuum hoses
Cleaned the ground by the thermostat housing.

I have no more clue what to do to stop this so any help would be appreciated, really!

Thanks!

Topic

[Rich]

If there really is no camshaft position sensor and the spark plugs are somehow used as sensors, you might consider mechanical and ignition timing as next directions.

[Alexander]

According to some sources the camshaft sensor is in the DIC.

The whole thing started after I replaced the battery, forgot to mention that.
Bought a battery from the junkyard that is now dead, but replaced with a new one now.

[David]

Finding a good Saab or vw technician is very hard. From what I hear most techs just get frustrated with those brands

[Author]

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