I have a 1988 FJ62, 187K. I have owned it since 2018, I'm the 3rd owner. I took it to a Toyota Dealer in Montana to have all the engine seals replaced. This was too big a job for me and I wanted it to go to a place that would have the expertise in completing the job. Every seal was replaced we even took care of the oil gallery plug. Since the engine was put back in, there have been some issues and one that has yet to be resolved.
The engine reseal was finished in mid March 2022 and we’ve had staring problems ever since. At first is was a rough start and then hard to start and then it was unreliable starting, that's when I took it back in. They’ve assured me there are no known vacuum leaks. The cold start injector switch (was determined to be faulty-ohm meter) plus coolant temperature switch at t-stat housing were changed out. The timing is dialed in and the throttle position sensor cleaned and exercised plus the idle air control motor cleaned and exercised. The starter was good and since the seals were done it has been replaced, which helped a lot and vehicle actually started 9x in a row, they thought it was fixed, but no. The fuel pump and fuel pressure are good, injectors do pulse and a new battery, rotor and distributor cap and plugs were replaced when engine seals were done and all grounds were checked.
What has been confirmed is that the injectors are not firing at startup. The engine will start and run after multiple (3-5) key turns from lock to on and then after this it usually fires up (this is after the starter was replaced). The engine after starting runs great, and the injectors do pulse while it's running, we're having the problem at startup.
Recently a donor ECM replaced the existing original ECM to eliminate the question of a bad ECM. No changes were observed, and it was confirmed that it is not the ECM.
The ignition switch was suggested, but as of now they have ruled that out as being the issue. They have looked really closely at the wiring harness too, since that was moved out of the way when engine was pulled.
As of right now....they are trying to track down what gives the ECM the signal to fire the injectors. They know the ECM makes the injectors fire, but what tells the ECM to fire injectors? They have followed the FSM for this year and model especially the fuel injection schematics.
I may not be including everything they have done and they have probably done more diagnosis, testing and troubleshooting than I have described here.
I have checked several forums and have not found this specific issue. If I missed it, please point me in the right direction.
Any suggestions/solutions would be appreciated. Prior to the repair, the engine started right up without any issues.
I'll try and answer questions asap, I may be slower to reply than you may be expecting.
Thank you
The engine reseal was finished in mid March 2022 and we’ve had staring problems ever since. At first is was a rough start and then hard to start and then it was unreliable starting, that's when I took it back in. They’ve assured me there are no known vacuum leaks. The cold start injector switch (was determined to be faulty-ohm meter) plus coolant temperature switch at t-stat housing were changed out. The timing is dialed in and the throttle position sensor cleaned and exercised plus the idle air control motor cleaned and exercised. The starter was good and since the seals were done it has been replaced, which helped a lot and vehicle actually started 9x in a row, they thought it was fixed, but no. The fuel pump and fuel pressure are good, injectors do pulse and a new battery, rotor and distributor cap and plugs were replaced when engine seals were done and all grounds were checked.
What has been confirmed is that the injectors are not firing at startup. The engine will start and run after multiple (3-5) key turns from lock to on and then after this it usually fires up (this is after the starter was replaced). The engine after starting runs great, and the injectors do pulse while it's running, we're having the problem at startup.
Recently a donor ECM replaced the existing original ECM to eliminate the question of a bad ECM. No changes were observed, and it was confirmed that it is not the ECM.
The ignition switch was suggested, but as of now they have ruled that out as being the issue. They have looked really closely at the wiring harness too, since that was moved out of the way when engine was pulled.
As of right now....they are trying to track down what gives the ECM the signal to fire the injectors. They know the ECM makes the injectors fire, but what tells the ECM to fire injectors? They have followed the FSM for this year and model especially the fuel injection schematics.
I may not be including everything they have done and they have probably done more diagnosis, testing and troubleshooting than I have described here.
I have checked several forums and have not found this specific issue. If I missed it, please point me in the right direction.
Any suggestions/solutions would be appreciated. Prior to the repair, the engine started right up without any issues.
I'll try and answer questions asap, I may be slower to reply than you may be expecting.
Thank you
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