01 ES300 Unresolved Misfire
09-02-21, 03:11 PM
#16
Driver School Candidate
Thread Starter
Have you tried using a stethoscope or a long screw driver to listen to the fuel injectors while the engine is running? There is a distinct clicking that comes from the injector when you put your ear on it. If all front 3 injectors are dead, you have to get a wiring diagram and start tracing the source of the voltage.
I had the injectors out at one point tested them with 12v and could here a click on each one is this the same click your talking about when the car is running ? Also I found this relay and fuse box next to the battery for some reason the 20A fuse is missing for EFI and where the fuse connects to there is only one connection for one blade of the fuse to connect to ??? It don’t look right like maybe it’s broke or is it supposed to be this way ? Let me know thanks I attached a picture
09-02-21, 08:15 PM
#17
Pole Position
Hello again
I had the injectors out at one point tested them with 12v and could here a click on each one is this the same click your talking about when the car is running ? Also I found this relay and fuse box next to the battery for some reason the 20A fuse is missing for EFI and where the fuse connects to there is only one connection for one blade of the fuse to connect to ??? It don’t look right like maybe it’s broke or is it supposed to be this way ? Let me know thanks I attached a picture
I had the injectors out at one point tested them with 12v and could here a click on each one is this the same click your talking about when the car is running ? Also I found this relay and fuse box next to the battery for some reason the 20A fuse is missing for EFI and where the fuse connects to there is only one connection for one blade of the fuse to connect to ??? It don’t look right like maybe it’s broke or is it supposed to be this way ? Let me know thanks I attached a picture
The fact that injectors click tells you close to nothing, the only thing it means is that the coil is still intact, it doesn't tell you whether there is a leak in the seals, if the injector is clean on the inside and doesn't leak, or if the injector is just dripping fuel instead of creating mist like it's supposed to. Stethoscopes and wiring will only tell you whether injectors fire at all or not, which they probably do, since the car will have an unbelievably hard time staying running on only 3 out of 6 cylinders. All that leads to the fact that to go anywhere from this point, you need a scan tool, without it, you are basically pointing at the sky. It seems like you already checked the spark and it is solid, so now you need to know whether your misfire is caused by incorrect mixture, which is where aforementioned fuel trims come in.
Hope this helps and best of luck!
09-03-21, 07:25 AM
#18
Driver School Candidate
Thread Starter
With no EFI fuse in place, there would be no power going to the ECU, so the car won't even think of starting, let alone driving. That's an old trick of those cars, not the only misplaced fuse if I do remember correctly, here you can find a fuse diagram for your car.
The fact that injectors click tells you close to nothing, the only thing it means is that the coil is still intact, it doesn't tell you whether there is a leak in the seals, if the injector is clean on the inside and doesn't leak, or if the injector is just dripping fuel instead of creating mist like it's supposed to. Stethoscopes and wiring will only tell you whether injectors fire at all or not, which they probably do, since the car will have an unbelievably hard time staying running on only 3 out of 6 cylinders. All that leads to the fact that to go anywhere from this point, you need a scan tool, without it, you are basically pointing at the sky. It seems like you already checked the spark and it is solid, so now you need to know whether your misfire is caused by incorrect mixture, which is where aforementioned fuel trims come in.
Hope this helps and best of luck!
The fact that injectors click tells you close to nothing, the only thing it means is that the coil is still intact, it doesn't tell you whether there is a leak in the seals, if the injector is clean on the inside and doesn't leak, or if the injector is just dripping fuel instead of creating mist like it's supposed to. Stethoscopes and wiring will only tell you whether injectors fire at all or not, which they probably do, since the car will have an unbelievably hard time staying running on only 3 out of 6 cylinders. All that leads to the fact that to go anywhere from this point, you need a scan tool, without it, you are basically pointing at the sky. It seems like you already checked the spark and it is solid, so now you need to know whether your misfire is caused by incorrect mixture, which is where aforementioned fuel trims come in.
Hope this helps and best of luck!
09-03-21, 07:37 PM
#19
Pole Position
Woops, sorry, I thought you have an 02 for some reason..
Here you can find a fuse diagram for a 2000-2001 ES300. It seems like the box you showed on the photo is actually for the headlights, and that fuse is supposed to be missing; you need a fuse box located alongside the Driver's fender, the biggest one in the car.
Hope this helps and best of luck!
Here you can find a fuse diagram for a 2000-2001 ES300. It seems like the box you showed on the photo is actually for the headlights, and that fuse is supposed to be missing; you need a fuse box located alongside the Driver's fender, the biggest one in the car.
Hope this helps and best of luck!
12-26-21, 10:16 PM
#20
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outside combustion chamber has spark does not means inside the combustion chamber has
Hello,
Why did you abandon your initial thread?
You wrote that there was no spark on Cylinder 6, but at the same time, you claim that there is spark on all the coils in Bank 2, so is the spark present on all the cylinders when you check it?
Misfire doesn't exclusively indicate the fact that you don't have spark, it means that not everything in the chamber managed to combust fully, or the combustion did not produce expected results, whether it's because of no spark or no compression. Check that the spark is solid as I described in your previous thread, if that's good, then it will be time to start looking into other causes, like VVT system or some sensor failure, vacuum leaks, etc., for which you will need an appropriate scan tool.
Hope this helps and best of luck!
Why did you abandon your initial thread?
You wrote that there was no spark on Cylinder 6, but at the same time, you claim that there is spark on all the coils in Bank 2, so is the spark present on all the cylinders when you check it?
Misfire doesn't exclusively indicate the fact that you don't have spark, it means that not everything in the chamber managed to combust fully, or the combustion did not produce expected results, whether it's because of no spark or no compression. Check that the spark is solid as I described in your previous thread, if that's good, then it will be time to start looking into other causes, like VVT system or some sensor failure, vacuum leaks, etc., for which you will need an appropriate scan tool.
Hope this helps and best of luck!
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