Component Testing: Tachometer
Connect a test tachometer to ignition system. Start engine and compare vehicle tachometer readings to test tachometer reading. If vehicle tachometer reading is outside allowable range, replace tachometer. See TACHOMETER TEST TABLE .
TACHOMETER TEST
| Test Tachometer RPM | Allowable Vehicle Tachometer RPM |
|---|---|
| 700 | 630-770 |
| 1000 | 900-1100 |
| 2000 | 1850-2150 |
| 3000 | 2770-3230 |
| 4000 | 3770-4230 |
| 5000 | 4800-5200 |
| 7000 | 6700-7300 |