I bought an 80 3yrs ago. Well long story short. It is running really bad. The mechanic tried to pull codes and it didn't show anything. I pulled the instrument cluster and there was no bulb in the check engine light spot. The previous owner removed all the pollution equipment from the LC. Do you think the bulb was taking out because of the removal of the pollution equipment. Would that have made the check engine light come on?
No check engine light (1 Viewer)
- Thread starter Jpmreno
- Start date
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quite possibly.
what year 80?
Some are OBD1 and some are OBD2
what year 80?
Some are OBD1 and some are OBD2
93yotasr5
Come and take it
Most likely. I’d replace the bulb and go from there.
I pulled all the pollution equipment EGR+PAIR on my 94 us spec you will need to connect the 2 pins on the EGR wire of the rig
I have a functional bulb at check engine with no code
Builds - Build Thread - my Enola Gay FZJ80 1994 - https://forum.ih8mud.com/threads/build-thread-my-enola-gay-fzj80-1994.999495/post-11273483
I have a functional bulb at check engine with no code
Builds - Build Thread - my Enola Gay FZJ80 1994 - https://forum.ih8mud.com/threads/build-thread-my-enola-gay-fzj80-1994.999495/post-11273483
^^^^^
This.
Then pull the EFI fuse under the hood for 5 minutes. Reinsert and start up.
Pulling the fuse will clear all previous codes and reset your ECU to relearn.
It may run really rough at first and hunt for rpm, but it should settle down after a few minutes.
Then drive it and see what codes it sets.
When you turn the key to the "RUN" position before you start, the CEL should be on to show the computer is in a ready state to start.
Then, after starting, it may come on right away or force t may take some driving to set codes.
Drive it for a few days and with some distance if possible to force it to set codes so you can address all of them.
Your 94 truck is OBD 1, so there are fewer aftermarket readers available. The one @Desert Dino mentioned in the other thread is the most common.
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Is a 1993 fzj80 ob1 or 2 ?
OBD 1
thatcabledude
GOLD Star
Sounds like you likely have a bad ECM. What is the build date of your truck? Look in the driver door jam.
I couldn’t find any dates inside the drivers door jam. I looked on the door and on the pillar aswell, nothing.
thatcabledude
GOLD Star
Would be in sticker that looks similar to this. Date is on top right in example picture.
I'm sure its late 1992/early 1993. Know bad ECU in that time frame for fzj80s. Lots of threads for that.
03/93 March 1993
Yup. The early 93 is known as a failure and it typically gives those codes and they seem to be insurmountable.
A 94 ECU will resolve the issue.
Order one (used) from @slow95z as he stated. You're in Canada, so it may take a bit.
Hey guys I just got a 91 and it is having an intermittent won’t start issue. I swapped the efi relay. I was getting a CEL when turning the key to on but I no longer am. This is so frustrating I just got it back from a shop. This is the first Toyota that has ever given me trouble. I’m actually broke down in Boone NC Toyota dealer and they won’t help me out it’s unreal. My dog is in the truck. They seem to think it’s fuel pump. I try ether and it tries to start. When it cools over night it starts. Do I have a bad ecu also or what ughhhh. It seems to rough idle and not start after filling it with gas. I don’t know what else to do seems no one wants to work on these or don’t know anything about em. Thanks in advance for the help
The shop that had it said they couldn’t read the obd 1 and I couldn’t get the paper clip to do anything
ppc
M Go Blue
First thing you should do is replace the fusible links. The parts cost should be less $20 and can be done in the parking lot with some basic tools.
If it will start with ether, then it is most likely the VAF or Vane Air Flow on the intake. Open it up and do a diagnostic on the flap in there to make sure it has movement and that the movement creates the proper change in voltage on the output when moved.
The fact that you do NOT have a CEL tells you the computer does not have the proper inputs to allow it to start.
The VAF not operating will not allow the fuel pump to turn on. The fuel pump on these does NOT run until they see rotation of the engine ( @jonheld please verify for the 91)
Check your fuel pump relay. Common to fail when hot.
Check the ground wire on the ingitor on the LF inner fender.
Make sure that all your distributor wires are properly installed and routed.
You have spark.
You have airflow.
You need fuel. Something is prohibiting the fuel pump from operating.
Couple of thoughts.
If the ECU is not getting power, there will be no codes to read.
The fuel pump only runs when cranking the starter, not just with the key in the ON position.
The 3FE doesn't have a "fuel pump relay". It's called a circuit opening relay and it is fired from the starter circuit.
Without the CEL on, you have a 6000 pound paperweight. Have a look at the resources section and download the 3FE EFI troubleshooting flowchart.
If the ECU is not getting power, there will be no codes to read.
The fuel pump only runs when cranking the starter, not just with the key in the ON position.
The 3FE doesn't have a "fuel pump relay". It's called a circuit opening relay and it is fired from the starter circuit.
Without the CEL on, you have a 6000 pound paperweight. Have a look at the resources section and download the 3FE EFI troubleshooting flowchart.
