Hey guys,
I'm the proud owner of a 1988 4Runner with the 22RE 4-banger. Recently it has been acting up on me (obviously not getting enough attention). I've followed the troubleshooting rabbit trail about as far as it will go so I am looking for advice.
The truck starts and runs perfectly fine when cold. Once hot, the engine will crank over but not start. After it cools for an hour or so, it will restart easily. This issue is very consistent.
When it refuses to hot-start, I can spray a small amount of starting fluid into the throttle body and then it will start and run without issue.
Here are a few things I've ruled out:
- Ignition is good, spark is hot blue even when cranking hot.
- Fuel pressure is good (40psi) [only checked when cold, need to confirm when hot]
- I have swapped/borrowed multiple electronic components and none of them have changed the issue, including: engine coolant sensor, air flow meter, circuit opening relay, ECU, coil & igniter.
It appears that the injectors simply are not firing when the engine is cranking when hot. I just got a stethoscope and will try to better understand what the injectors are doing.
One other oddity is that the engine does crank over slowly. Battery is brand new and reads high voltage. Grounds are good. Starter is brand new. Starter cable has good contact between both battery and starter terminal. Could this be a failing ignition switch?
Any further ideas would be helpful.
I'm the proud owner of a 1988 4Runner with the 22RE 4-banger. Recently it has been acting up on me (obviously not getting enough attention). I've followed the troubleshooting rabbit trail about as far as it will go so I am looking for advice.
The truck starts and runs perfectly fine when cold. Once hot, the engine will crank over but not start. After it cools for an hour or so, it will restart easily. This issue is very consistent.
When it refuses to hot-start, I can spray a small amount of starting fluid into the throttle body and then it will start and run without issue.
Here are a few things I've ruled out:
- Ignition is good, spark is hot blue even when cranking hot.
- Fuel pressure is good (40psi) [only checked when cold, need to confirm when hot]
- I have swapped/borrowed multiple electronic components and none of them have changed the issue, including: engine coolant sensor, air flow meter, circuit opening relay, ECU, coil & igniter.
It appears that the injectors simply are not firing when the engine is cranking when hot. I just got a stethoscope and will try to better understand what the injectors are doing.
One other oddity is that the engine does crank over slowly. Battery is brand new and reads high voltage. Grounds are good. Starter is brand new. Starter cable has good contact between both battery and starter terminal. Could this be a failing ignition switch?
Any further ideas would be helpful.