'94 Tach Problems
My '94 IDI Factory Turbo has an issue with the Tach at idle, or when I let off the accellerator when I am driving. It drops to zero until I touch the throttle, then it seems to operate accurately. I would'nt really worry but it has an E40D tranny and when it drops to zero the overdrive light blinks. It is directly linked to the tach, because it quits the instant I touch the throttle. I thought I had it fixed with a new speed sensor on the differintial,( it quit blinking for a couple of weeks) but it started again. Do I need to replace something on the tach? Whole tach system? Maybe clean it where it goes into the engine? If any body has any has any info. on tachs let me know. I am positive my blinking overdrive light is linked to the faulty tach, just have no idea how to deal with it. Thanks!