Your Vehicle: 2001 Ford Escort ZX2 L4-2.0L DOHC VIN 3
 
Vehicle » Testing and Inspection » Symptom Related Diagnostic Procedures » 5: Road Test » Drive Engine Run-up (DERU) Load Test  
 
 
  Drive Engine Run-up (DERU) Load Test  
 

To carry out this test, proceed as follows:

  • Apply the parking brake and the service brake.
  • Install a tachometer.
  • Shift the transmission into DRIVE, and increase and decrease the engine rpm between an idle to approximately 2,000 rpm . Note the engine rpm and, if possible, determine the vibration frequency.
  • Repeat the test in REVERSE.
  • If the vibration/noise is duplicated when carrying out this test, inspect the engine and transmission or transaxle mounts.
  • If the concern is definitely engine speed-related, carry out the Engine Accessory Test to narrow down the source. See: Engine Accessory Drive Test
  • Proceed as necessary.

WARNING: BLOCK THE FRONT AND REAR WHEELS, AND APPLY THE PARKING BRAKE AND THE SERVICE BRAKE, OR INJURY TO PERSONNEL CAN RESULT.

CAUTION : Do not carry out the Engine Load Test for more than five seconds or damage to the transmission or transaxle can result Block the front and rear wheels.