G
Guest
·While re-assembly of the EGR valve housing I cracked it at the air intake side. My torque wrench was set for 13 ft-lbs (156 in-lbs), which is torque for the intake manifold bolts (EGR goes on the same intake bolts to the rear of the block). I did not even get the wrench to click when the housing snapped. I guess it was either crooked, or the wrench (my settings?) failed me.
Now, I will have to hunt the junk yards for replacements, I am sure Toyota has them, but they will charge me arm-and-leg for it.
EGR works by redirecting small amount of exhaust gases to intake. Exhaust gasses do not burn so the mixture becomes somewhat lean and cooler when burning. That controls the NO compounds. BTW, I previously failed NO emmisions, when I took the EGR housing off, I noticed it was 1/2 clogged with carbon deposits, hence it did not work properly. I am sure there were other reasons, too.
EGR is closed at cold start and at full throttle. It works in mid-rpm ranges.
If I cannot find one in the future I am considering playing with and electronic EGR from other vehicles and custom control it (autotronix project). For right now I might fabricate plates and close the ports and forego the EGR totally for a while.
If I forgo the EGR I am sure to fail emmisions and polute a little more, a bad, bad thing, but the engine should run until I can fabricate, or find replacement.
Finally, my Supra is the California edition, it has fuel temperature sensor in the EGR housing. It sends 0-5V signal to the computer by varying the resistance depending on the temprature. What happens at the computer I have no idea. Why the sensor is in the EGR housing not on the intake maifold I don't know. maybe I am confused.
Any comments, or sources of EGR housing parts, will be appreciated.
Now, I will have to hunt the junk yards for replacements, I am sure Toyota has them, but they will charge me arm-and-leg for it.
EGR works by redirecting small amount of exhaust gases to intake. Exhaust gasses do not burn so the mixture becomes somewhat lean and cooler when burning. That controls the NO compounds. BTW, I previously failed NO emmisions, when I took the EGR housing off, I noticed it was 1/2 clogged with carbon deposits, hence it did not work properly. I am sure there were other reasons, too.
EGR is closed at cold start and at full throttle. It works in mid-rpm ranges.
If I cannot find one in the future I am considering playing with and electronic EGR from other vehicles and custom control it (autotronix project). For right now I might fabricate plates and close the ports and forego the EGR totally for a while.
If I forgo the EGR I am sure to fail emmisions and polute a little more, a bad, bad thing, but the engine should run until I can fabricate, or find replacement.
Finally, my Supra is the California edition, it has fuel temperature sensor in the EGR housing. It sends 0-5V signal to the computer by varying the resistance depending on the temprature. What happens at the computer I have no idea. Why the sensor is in the EGR housing not on the intake maifold I don't know. maybe I am confused.
Any comments, or sources of EGR housing parts, will be appreciated.
.....you live in IL, you will not fail emmisions, block it off I say!
