Tachometer Test
Connect a tune-up test tachometer and start engine. Compare vehicle tachometer RPM reading against test tachometer. If vehicle tachometer reading is outside allowable range, replace tachometer. See TACHOMETER TEST table.
TACHOMETER TEST
| Vehicle RPM Reading | Allowable Range |
|---|---|
| Pickup | |
| 700 | 610-750 |
| 3000 | 2850-3150 |
| 5000 | 4850-5150 |
| 7000 | 6790-7210 |