Checking engine performance – Banks Power Dodge Trucks: (Diesel ’94 - 98 5.9L Cummins) Power Systems- PowerPack, Stinger-Plus & Stinger systems User Manual
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Go over the entire installation as a precautionary check to ensure
that all clamps are tight, wiring and hoses are properly routed,
and connections are tight. Start the engine and allow it to warm
up. Drive the vehicle under light load (normal around town
driving) for 20 to 30 minutes, and listen for any exhaust leaks or
rattles, or intake boost leaks. Shut off the engine and re-tighten
all intercooler and turbocharger boost clamps. These connections
may have loosened with time, and if leaking, will cause a drop in
boost pressure with a loss in performance. Check that clamps are
properly positioned on hoses, and periodically check tightness of
hose clamps at regular maintenance intervals, such as when the
oil is changed.
observe the operation of the boost and pyrometer gauges while
driving under varying conditions. Turbocharger boost pressure
will increase as a function of load and engine Rpm, thus the
engine will produce little boost while cruising at light throttle,
with maximum boost while climbing hills heavily loaded during
acceleration. Note the boost level seen during hard acceleration
with a given load. If performance seems to have deteriorated
sometime in the future, the maximum boost figures may be
compared to see if boost has dropped off. Lower boost may
be caused by turbo ducting leaks, a malfunctioning wastegate
or fuel injection pump, or a dirty air filter. Typical maximum
boost pressure settings for the Dodge/Cummins diesel will vary
considerably with stick or automatic transmission options, year
model of vehicle and altitude.
Use your pyrometer (exhaust gas temperature) gauge to monitor
exhaust gas temperature (EGT) in the engine. at idle, exhaust gas
temperature will be very low, perhaps only 300 degrees f. as the
engine is accelerated for higher speeds with greater loads, the
EGT will rise. The highest EGT will be seen under maximum load
at full throttle, such as climbing a steep grade with a heavily laden
vehicle. Use caution if your pyrometer reading approaches 1300
f, with 1350 f being the aBsOLuTe MaxIMuM! exceeding these
figures for more than a brief moment may cause engine damage.
If the vehicle reaches maximum EGT under these conditions,
downshift the vehicle to reduce load, or back off the throttle.
If the vehicle shows excessive smoke while accelerating (see
page 15).
CHECkING ENGINE pERfoRmaNCE
p.N. 96384 V.3.0