Help me find my EGR (1998 LS400)
#1
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Help me find my EGR (1998 LS400)
1998 LS400 (1UZ-FE VVT-i) EGR Location
I've looked all over my engine and all over the Internet. Everything indicates that my 1UZ-FE VVT-i has an EGR, but I can't find it anywhere. I just barely failed smog with too much NOX, and want to make sure the EGR is not clogged.
Please help me find my EGR.
I've looked all over my engine and all over the Internet. Everything indicates that my 1UZ-FE VVT-i has an EGR, but I can't find it anywhere. I just barely failed smog with too much NOX, and want to make sure the EGR is not clogged.
Please help me find my EGR.
#2
Moderator
A 1UZ-FE for a 98-00 does not have any external EGR pipe or a passage. It is controlled by the valve timing. So the EGR is done internally in the combustion chamber.
#3
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http://www.carparts.com/details/Lexu.../SIEGV862.html
#5
Moderator
That explains why I can't find it, but what's this?
http://www.carparts.com/details/Lexu.../SIEGV862.html
http://www.carparts.com/details/Lexu.../SIEGV862.html
I don't guarantee that though.
You'd better see the service manual before you act.
#6
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I was just hoping that you were wrong, because I know how to clean a clogged EGR and I know that a clogged EGR will cause high NOX. But with no EGR to clean, I have no idea how to solve my problem. I guess I need to check my smog results for CO, as that should tell me if I'm running lean. But with a functioning O2 sensor, I shouldn't be running lean, right? How does one adjust the air fuel ratio in a fuel injected engine who's air fuel ratio is controlled by the computer?
#7
1998 LS400 (1UZ-FE VVT-i) EGR Location
I've looked all over my engine and all over the Internet. Everything indicates that my 1UZ-FE VVT-i has an EGR, but I can't find it anywhere. I just barely failed smog with too much NOX, and want to make sure the EGR is not clogged.
Please help me find my EGR.
I've looked all over my engine and all over the Internet. Everything indicates that my 1UZ-FE VVT-i has an EGR, but I can't find it anywhere. I just barely failed smog with too much NOX, and want to make sure the EGR is not clogged.
Please help me find my EGR.
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#8
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But, what if 1 or 2 fuel injectors are 50% clogged? Does the computer have a separate lookup table for each injector? Is this even useful or possible with 1 or 2 O2 sensors that are positioned after the exhaust from all the cylinders is combined? What if the O2 sensor is trying to adjust the average fuel to all the cylinders combined, but 6 are getting a little too much fuel while those 2 that are partially clogged are getting way to little fuel and therefor running lean and hot so they are generating a bunch of NOX?
So, right now I'm suspecting that I might have one or more partially clogged fuel injectors.So, the first thing I'm going to try is fuel injector cleaner.
I'm watching this guys videos to see what works best for cleaning carbon deposits.
https://m.youtube.com/user/paintballoo7
#9
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I believe that you are right and carparts.com and napaonline.com are wrong.
I was just hoping that you were wrong, because I know how to clean a clogged EGR and I know that a clogged EGR will cause high NOX. But with no EGR to clean, I have no idea how to solve my problem. I guess I need to check my smog results for CO, as that should tell me if I'm running lean. But with a functioning O2 sensor, I shouldn't be running lean, right? How does one adjust the air fuel ratio in a fuel injected engine who's air fuel ratio is controlled by the computer?
I was just hoping that you were wrong, because I know how to clean a clogged EGR and I know that a clogged EGR will cause high NOX. But with no EGR to clean, I have no idea how to solve my problem. I guess I need to check my smog results for CO, as that should tell me if I'm running lean. But with a functioning O2 sensor, I shouldn't be running lean, right? How does one adjust the air fuel ratio in a fuel injected engine who's air fuel ratio is controlled by the computer?
to the ECU and ECU controls the air/fuel mixture
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