because a Saab has cam pistons , so your Saab is a 2.5 liter v6.it runs at a low rpm because you probably need to change the MOTOR OIL. people have been asking me that!!!
it only studders at low rpm it runs great at high rpm or accelerating only at idle and take off rpm
if the car is in park the almost any car wont go over 4000 rpm usaully like 3700 it is a safety issue
You May Have a misfire if Check Engine Light is on Have it Scanned or possibly a dirty Mass Air Sensor
A 2003 Mercury 115 that runs rough at a low rpm might be having a problem with the MAP Sensor or the Oxygen Sensor. The MAP Sensor is going to be the easiest one to replace because it is usually located plugged into the EFI (Electronic Fuel Injector), a fancy would for carburetor.
Idle speed could be 550-900 rpmIdle speed could be 550-900 rpm
Should be about 8 or 900 RPM.
High end Rpm output tails sooner, engines idle is lumpy, emissions are higher, too much overlap can cause rough low rpm driving, more chance of detonation.
It will idle as low as 600 rpm.It will idle as low as 600 rpm.
The resolution to the problem above was two broken motor mounts and hairline crack in a vacuum hose.
Correct low idle speed should be in the neighborhood of 750-800 rpms. A bit higher when the engine is cold is acceptable. Anything higher, above 1000 rpm probably indicates an issue that needs to be addressed.
the idle should be about 900 RPM in park or neutral.
the RPM should idle 700 - 900