Strange knocking in the motor
#11
#15
A buz test is done with a scanner that works on Powerstrokes.
It sends a signal to each injector and waits for a response with engine off. This can tell if the electrical system side of the injector including the IDM,harness,uvc harness,injector solenoid is all working. The buz test test each cylinder.
The buz test does not check the mechanical part of injectors such as poppet valves or nozzles. You can pass all buzz test and have bad injector.
Cylinder contribution test using same scanner will test with engine running and show if any are not contributing power. If its passes the buzz test i would pull the valve covers off and start the truck and make sure all the injectors are pumping oil. A good scanner is the AutoEnginuity.
It sends a signal to each injector and waits for a response with engine off. This can tell if the electrical system side of the injector including the IDM,harness,uvc harness,injector solenoid is all working. The buz test test each cylinder.
The buz test does not check the mechanical part of injectors such as poppet valves or nozzles. You can pass all buzz test and have bad injector.
Cylinder contribution test using same scanner will test with engine running and show if any are not contributing power. If its passes the buzz test i would pull the valve covers off and start the truck and make sure all the injectors are pumping oil. A good scanner is the AutoEnginuity.
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Powerstroke63 (06-22-2012)
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