Have Toyota Questions? Ask a Mechanic for Answers ASAP
Hello, my name is Bobby. Thank you for the question. Can you tell me if this occurs more when hot or cold and if it happens every time you drive it?
Thanks for the response. It does not sound like a computer issue. They need to so a hot and cold compression test on the engine. This engine has a history of failures with the valve seats. This can cause a compression issue at intermittent times. Most of the time the compression test will show this.
Thank you. Let me know what happens and we can continue if needed.
If they do not find any issues at all when they finish the compression test then they need to try running some intake cleaner like Seafoam through the engine to see if it has any carbon build up. If that does not help then you may have an issue within the wiring harness.
They are right that it is very difficult to find a wiring issue. After they try the Seafoam let me know what happens. Thanks for the update.
Are you still getting the same computer codes?
It really sounds like a bad ground or connection problem from what you are telling me, unless there is build up that the Seafoam will clean out.
The main thing is to check the ground connections from the engine and for the negative battery cable.
Are the code numbers exactly the same? Did they clear them after running the seafoam through it?
Thank you. This code states that there is an issue with the #3 coil. If the coil is fine then it can be the connection at the coil. I have seen a lot of connector issues at the coil that can cause this also.
If that is the code that is still coming up then they need to check the connection at the #3 coil