[Aurel]

Here are the symptoms:

1. Does not start well in cold weather (takes at least 10s cranking)
2. Sometimes will stall with a pop a few minutes after driving cold. Will not restart unless I give it more gas by lifting the air meter.
3. Gas mileage is down by about 2 mpg.
4. There is a very annoying vibration noise linked with the throttle, when the car is under load. Same rpms in with clutch in makes the vibration go away.
5. Still good power an running well besides these annoyances.

I am suspecting that all these symptoms can be caused by one of the CIS components going bad, but which? WUR, CSV...? I would be especially interested to know if the sound I am hearing can be attributed to failure of one of these.