Checking engine performance – Banks Power Dodge Trucks: (Diesel ’94 - 98 5.9L Cummins) Power Systems- PowerPack, Stinger-Plus & Stinger systems User Manual

Page 19

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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

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