WORKHORSE CUSTOM CHASSIS
Service Manual
W SeriesWCC
SECTION
6.2
PAGE
18
Engine Mechanical
W Series Chassis
TOC
© 2006 WorkhorseCustom Chassis — All Rights Reserved
A damaged crankshaft reluctor wheel
A damaged crankshaft reluctor wheel can result in different symptoms,
depending on the severity and location of the damage.
• Systems with electronic communications, DIS, or coil per cylinder,
and SEVERE reluctor ring damage may exhibit periodic loss of crankshaft
position, stop delivering a signal, and then re-sync the crankshaft position.
• Systems with electronic communication, DIS, or coil per cylinder, and
SLIGHT reluctor ring damage may exhibit no loss of crankshaft position
and no misfi re may occur. However, a DTC P0300 may be set.
• Systems with mechanical communications and SEVERE reluctor ring
damage may cause additional pulses and affect fuel and spark delivery to
the point of generating a DTC P0300 or DTC P0336.
Replace the sensor and/or crankshaft reluctor wheel, as required.
BASE ENGINE MISFIRE WITH ABNORMAL VALVE TRAIN NOISE
Cause Correction
Worn or loose rocker arms Repair or replace the valve rocker arms, as required.
Worn or bent push rods Replace the push rods.
Sticking valves
Carbon buildup on the valve stem and/or seat can cause the valve to not
close properly.
Repair or replace, as required.
Excessively worn or mis-aligned timing chain Repair or replace the timing chain, camshaft retainer, and sprockets,
as required
Worn camshaft lobes Replace the camshaft and valve lifters.
Sticking lifters Replace, as required.