Remove
Injector — see operation "Injector, Remove and Install".
Caution
When checking injector, ensure fuel jet cannot contact eyes or skin as high pressure fuel can penetrate the body and cause serious injury.
Assemble
Injector to tester.
Measure
Injector opening pressure - operate pump lever several times to rinse injector, then slowly operate pump lever to raise pressure until injector sprays.
- 4JA1T engine — 181 bar.
- 4JA1TC engine — first stage 195 bar/ second stage 338 bar.
- 4JG2T engine — 147 bar.
Replace or adjust injector if opening pressure is incorrect — see operation "Injector, Clean and Adjust".
For the 4JA1TC engine, replace or clean injector if opening pressure is incorrect — see operation "Injector, Clean".
Inspect
On 4JA1T/4JA1TC engine; injector spray pattern (5-pole injectors):
- A correct.
- B incorrect - nozzle restricted.
- C incorrect - dripping.
Replace or clean injector is spray pattern is incorrect — see operation "Injector, Clean and Adjust".
Inspect
On 4JG2T engine; injector spray pattern:
- A correct.
- B incorrect - nozzle restricted.
- C incorrect - nozzle restricted.
- D incorrect - dripping.
Replace or clean injector if spray pattern is incorrect — see operation "Injector, Clean and Adjust".
Install
Injector — see operation "Injector, Remove and Install".
