[sausagehacker]

Correct me if I'm wrong, but doesn't the S2 have an additional temp sensor under the intake manifold? I thought I saw a thread recently about it - it's for air temp.

There are a few more sensors I would test (most can be tested with a multimeter, Clark's Garage has good info for many of them).

- TPS, because the idle switch may be on the way out
- Coolant temp sensor, because that factors into the fuel injection
- Air temp sensor I mentioned

The ISV (is it called that on the S2?) should be inspected as well. As Jfrahm mentioned, look for vacuum leaks.

beamishnz has a very good point about the motor mounts - they go out on our cars. Make sure you don't cheap on those if and when you replace them.