Troubleshooting guide

SERIES 60 EGR TECHNICIAN'S GUIDE

Power Loss Under Heavy Pull

In e xtreme cold ambient conditions, the engine will operate in Condensation Protection.

During this mode of operation, the engine boost will be reduced and there is no reduction of

power. Operating in this mode is a normal operating condition and will not affect engine life or

performance. Note: Trucks operating with winter fronts will experience this condition less often.

DDC’s recommendations have not changed regarding winterfront usage. A service bulletin issued

years ago will be re issued to restate DDC’s position.

Perform the following steps for PowerLossUnderHeavyPull.

1. Check for diagnostic trouble codes.

[a] If Fault Codes are logged, diagnose the l ogged codes first.

2. Visually inspect the air filter restrictions.

[a] If the air filter is clogged or dirty, replace the air filter.

3. Visually inspect the air inlet hoses for soft or collapsed areas.

[a] If the a ir inlet hoses are damaged, replace as necessary.

4. Visually inspect the air inlet for restrictions.

[a] If the air inlet has restrictions, clean as necessary.

5. Visually inspect the entire length of the breather tube for kinks.

[a] If the breather tube has kinks, repair as necessary.

6. Measure the fuel pressure under heavy l oads.

[a] If the fuel pressure was spiking or decreasing, perform step 7.

[b] If the fuel pressure was not spiking or decreasing, testing is complete.

7. Remove the fuel pump.

[a] If the fuel pump is damaged, replace the fuel pump.

[b] If the fuel pump is not damaged, perform step 8.

8. Remove the fuel injectors and inspe ct for combustion passing the seat.

[a] If seats are damaged, replace as necessary.

NOTE:

The injector may need t o be replaced also.

[b] If the seats are not damaged, testing is complete.

All information subject to change without notice. (Rev. April 2004) 5-3