For the idle first check that the idle switch is working when the throttle spool hits it (check with a meter). Make sure that the 3 screws on the intake are lightly screwed all the way in. Next make sure there is power to the lambda circuit, the most common failure is a bad lambda relay. Check all of the inputs to the lambda computer and connections to the frequency valve. Gas mileage for the automatic is less than for the 5 speed. On my most recent trip to Rhode Island it was mostly highway driving and I got about 20 mpg. City driving is probably about 16-17. If the idle is still rough you probably will wind up replacing the plugs and ignition wires. You might also have a dirty injector, If they are all not putting out a good spray and the same amount the engine will not run smooth at idle but will get smoother as the rpm's increase. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxx, "Jeff Angwin" <jeff@xxxx> wrote: > It runs well except that at idle it's rough. It starts just fine, but the idle RPM's fluctuate between 600 and 1000, every second or so. > Jeff > VIN 3034