6E–368
4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS
Step
Action
15
Remove the eye bolt with gauze filter from the injection pump and check for the following conditions.
Value(s)
Yes
No
—
Replace the eye bolt with gauze filter and verify repair
Go to Step 16
—
Replace the injection nozzle and verify repair
Go to Step 17
More than 2.1 Mpa
Verify repair
Go to Step 18
• Objects blocking at the gauze filter. Check for a condition that causes contaminated fuel, such as the customer is using an aftermarket fuel filter or extended maintenance interval. • Check for a condition that causes fuel waxing or icing, such as the customer is using an incorrect fuel type in winter season or water mixed with the fuel. If a problem is found, repair as necessary. Was the problem found?
16
Remove the injection nozzles from the engine and check for the following conditions. • Improper splay condition. • Operating pressure is incorrect. If a problem is found, repair as necessary. Was the problem found?
17
1 st Stage
2nd Stage
4JA1-TC
Approximatly 19.0 Mpa
Approximatly 33.5 Mpa
4JH1-TC
Approximatly 19.5 Mpa
Approximatly 33.8 Mpa
Check the engine compression pressure for each cylinders. If a problem is found, repair as necessary. Was the problem found?