2. Warm up the engine to normal operating temperature.
3. Turn off the engine.
4. Disconnect the crank position sensor.
5. Remove the fuel pump relay from the engine compartment fuse box.
6. Remove all 4 fuel injectors.
Note.
- When measuring compression in each cylinder of an engine, all 4 fuel injectors must be removed to obtain reliable results.
- The time for cranking the engine crankshaft with a starter should not exceed 10 seconds. The interval between repeated rotations must be at least 30 seconds.
7. Crank the engine with the starter for five seconds to remove all foreign material from the cylinders.
8. Before taking readings of the compression gauge, make sure that the frequency of cranking the crankshaft with the starter exceeds 140 rpm. If the speed is below 140 rpm, check the battery state of charge and the reliability of the starter contacts sprinkling.
9. Install the EN-48248 compression tester in the fuel injector hole of the corresponding cylinder.
10. Rotating the engine with a starter, wait until the compression gauge readings stabilize and record the values obtained. In a normal cylinder, the compression value is displayed quickly and evenly up to the set value. In the presence of malfunctions, the compression value is initially low, then gradually begins to increase, but does not reach the set level (piston ring leaks) or remains at the same level without increasing (valve leaks).
11. Disconnect the compression gauge from the fuel injector opening.
12. Repeat the compression measurement procedure for the remaining engine cylinders and record the values obtained.
Note. The normal value of compression in the engine cylinder is 2,600 kPa. The compression difference in different cylinders should not exceed 260 kPa.
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