EDI DIAGNOSIS SERVICE MANUAL NUMBER 22
Page 5E-82 90-860074--1 FEBRUARY 2002
Troubleshooting Charts (Continued)
CONDITION POSSIBLE CAUSES CORRECTION
SURGING
(SPEED
CHANGE)
1. If the condition occurs at idle,
the idle speed is set too low for
the accessories.
2. High pressure fuel leak.
3. One or more injectors worn or
not operating properly.
4. Improperly operating injection
- pumps
1. Adjust the idle speed.
2. Inspect/correct leaks in the
high pressure fines. Fittings
and delivery valve sealing
washers.
3. Check/replace the inoperative
injector
4. Replace the injector pump.
ENGINE RPM
WILL NOT
REACH RATED
SPEED
1. Engine overload.
2. Improperly operating
tachometer.
3. Throttle linkage worn or
incorrectly adjusted.
4. Inadequate fuel supply.
5. Air/fuel controls leak.
6. Improperly operating injection
pump.
7. Incorrect ECM part number
1. Verify high idle speed without
load. Investigate operation to
ensure correct gear is being
used.
2. Verify engine speed with hand
tachometer, correct as
required.
3. Adjust linkage for stop to stop
fuel control lever travel.
Replace linkage if necessary.
4. Check the fuel flow through
the system to locate the
reason for inadequate fuel
supply, correct as required.
5. Check and repair leak. Check
AFC tubing for obstruction.
6. Repair or replace injection
pump.
7. Ensure ECM part number is
correct for your model; some
derated ECMs are for dual
installations in emission
regulated countries
To Next Page
Loading...
Need help?
General