I know the 1991 Tercel doesn't have a choke, per-se, but it's acting very wierd. It starts fine, cold or warm. Passes California smog with flying colors and runs well. BUT - within a minute of starting and until the temp gauges gets above the "C" line - the car basically revs itself. It's a base model so I don't have a tach, but it sounds like at least a 1000 rpm swing - very consistant, but up & down like you were using your foot. It seems to have no effect on drivability though. Hit the clutch, drop it in first and pull away and you'd never know it was doing it, until you step on the clutch and take your foot off the gas. Once it hits a certain temp it settles down and seems to idle fine and it runs really well.
