LC4LIFE
Supporting Vendor
Hi Everyone,
I figured I would post up a small project I have been pulling together mainly to satisfy my curiosity about EGR bypass, testing, and making it look good. Many of us have experienced the P0401 or P0402 code and normally it is an EGR related issue. As you will come to find out, especially after reading many threads on EGR disabling, you will need a 4.7k ohm resistor installed in place of the temp sensor at the intake manifold and then disable or block some vacuum lines. This method only applies to the 95-97 years, which is what I drive. I built his only for testing, not for disabling mandated emissions controls. 93-94 OBD1 are now available as well.
There are two difficult parts to this project. First, a replacement plug for the wiring harness and second, something to replace at the intake manifold. I solved the electrical plug part, and use an allen plug for when I remove the temp sensor at the intake. Ultimately, I will have something built to replace the temp sensor and wiring and electrical plug that looks OEM, but it is really only a resistor giving the ECM the value it wants in order to achieve readiness. Bear in mind, you have to have ECM readiness before you do this and if you disconnect your battery you will loose readiness and not get it back unless you do some other work.
These are the threads I used for research and confirmation others have a successfully disabled the EGR without throwing any codes.
Disable the EGR system the (mostly) Toyota way
EGR Readiness Achieved with EGR Removed!
As of now, I have been building these plugs with the resistor hidden in them and it works like a charm. I have about 4000 miles on my LC with no codes and a nice cool pipe near the wiring harness. Here are a couple of pics of the part that plugs into the harness in lieu of the temp sensor electrical plug.
Still working to find some sort of alternative to the temp sensor at the intake and when I figure that out, I will post up the completed temp sensor testing harness. I figure this solution, especially for those of us that are picky about how things look, might be nice to have during our testing and diagnosis of EGR related problems like the common P0401 codes.
If you need one, you can buy it here - 1995-1997 FZJ80 EGR Temp Sensor Test Plug Kit. For $35 you will get the test plug, vacuum plugs, an allen plug, and instructions to your door if your in the Conti U.S.
I figured I would post up a small project I have been pulling together mainly to satisfy my curiosity about EGR bypass, testing, and making it look good. Many of us have experienced the P0401 or P0402 code and normally it is an EGR related issue. As you will come to find out, especially after reading many threads on EGR disabling, you will need a 4.7k ohm resistor installed in place of the temp sensor at the intake manifold and then disable or block some vacuum lines. This method only applies to the 95-97 years, which is what I drive. I built his only for testing, not for disabling mandated emissions controls. 93-94 OBD1 are now available as well.
There are two difficult parts to this project. First, a replacement plug for the wiring harness and second, something to replace at the intake manifold. I solved the electrical plug part, and use an allen plug for when I remove the temp sensor at the intake. Ultimately, I will have something built to replace the temp sensor and wiring and electrical plug that looks OEM, but it is really only a resistor giving the ECM the value it wants in order to achieve readiness. Bear in mind, you have to have ECM readiness before you do this and if you disconnect your battery you will loose readiness and not get it back unless you do some other work.
These are the threads I used for research and confirmation others have a successfully disabled the EGR without throwing any codes.
Disable the EGR system the (mostly) Toyota way
EGR Readiness Achieved with EGR Removed!
As of now, I have been building these plugs with the resistor hidden in them and it works like a charm. I have about 4000 miles on my LC with no codes and a nice cool pipe near the wiring harness. Here are a couple of pics of the part that plugs into the harness in lieu of the temp sensor electrical plug.
Still working to find some sort of alternative to the temp sensor at the intake and when I figure that out, I will post up the completed temp sensor testing harness. I figure this solution, especially for those of us that are picky about how things look, might be nice to have during our testing and diagnosis of EGR related problems like the common P0401 codes.
If you need one, you can buy it here - 1995-1997 FZJ80 EGR Temp Sensor Test Plug Kit. For $35 you will get the test plug, vacuum plugs, an allen plug, and instructions to your door if your in the Conti U.S.
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