Component Testing: Tachometer
Connect a tachometer to negative side of the ignition coil. Start engine to compare vehicle tachometer reading with test tachometer. See TACHOMETER ALLOWABLE VARIATION table for tachometer allowable error.
TACHOMETER ALLOWABLE VARIATION
| Standard Indication | Allowable RPM Range |
|---|---|
| 1000 | 1000-1050 |
| 2000 | 2000-2100 |
| 3000 | 3000-3150 |
| 4000 | 4000-4200 |
| 5000 | 5000-5250 |
| 6000 | 6000-6300 |