Engine Performance - Acceleration Test
86volvo02SECTION GROUP NO.
23 128A
DATE AUGUST 1986 RE:
ACCELERATION TEST
D24T
THIS BULLETIN APPLIES TO THE U.S. AND CANADA.
To check the acceleration performance on a diesel engine, use the following procedure:
Tool required: Stop watch.
These test conditions must be followed:
- The vehicle must have at least 3,000 miles (5,000 km)
- Normal curbside weight
- Normal (summer) tires at the correct pressure
- Engine at normal operating temperature
- Dry level test surface
- The test must be carried out in both directions and at low altitude
Manual Transmissions:
Carry out test in 3rd gear.
Automatic Transmissions:
Carry out test in position 2. Do not depress throttle to the floor, otherwise a downshift will occur.
Test:
1. Start normally
2. At 20 mph (30 km/h) engage 3rd gear and depress the accelerator pedal fully.
3. Measure the time needed to accelerate from 25 mph (40 km/h) to 55 mph (90 km/h)
Acceptable time:
D24T man/aut - 12 seconds.
If the test takes longer than specified:
1. Check that the air filter is not dirty (blocked).
2. Check that the fuel filter is not blocked, and that the 0-rings are in the correct position (see P70 SB 24 - 117 dated February 1986); check filter for condensation.
3. Refer to Fault Tracing procedures in Service Manual D24 Turbo Diesel, TP 30571/1 (English), page 18.