EGR troubleshooting
#1
Driver
Thread Starter
iTrader: (1)
Join Date: Feb 2010
Location: WA
Posts: 166
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
So I'm getting a code 71 and this weekend I pulled the whole EGR system and cleaned it. The plate from the egr to the manifold had one whole side blocked solid. It runs better but the code 71 is back. Does anyone have the manual pages on how to troubleshoot the system? I don't want to throw parts at it and it could be one of several parts...
I looked up parts for the heck of it! YUK! The EGR is $240 and the temp sensor is $125 for AFTERMARKET... yikes!
and the Vacuum Modulator Valve Assembly is $104 new OEM... def need to troubleshoot
![Egads!](https://www.clublexus.com/forums/images/smilies/pat.gif)
and the Vacuum Modulator Valve Assembly is $104 new OEM... def need to troubleshoot
Last edited by Acidic; 03-14-11 at 12:58 PM.
#5
Pole Position
Trending Topics
#9
Pole Position
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Sometimes it's cheaper to have it diagnosed somewhere and then you change whatever part it turns out to be. But, sometimes your ego gets the best of ya and you don't want other people touching your car. In that case, you can spend thousands just throwing parts at a problem,
like so many of us have done in the past.
![Uhh...](https://www.clublexus.com/forums/images/smilies/1387914497.gif)
![Roll Eyes (Sarcastic)](https://www.clublexus.com/forums/images/smilies/rolleyes.gif)
#10
Driver
Thread Starter
iTrader: (1)
Join Date: Feb 2010
Location: WA
Posts: 166
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Found the problem. I paid the $15 for TIS, downloaded the EGR system tests, EGR was good, VSV was good, but the EGR vacuum modulator was toast. $104 but at least I didn't pay $85 to have it diagnosed and whatever list is for the part...
Moral of the story is that TIS is your friend...
Moral of the story is that TIS is your friend...
#14
Driver School Candidate
Join Date: Jan 2012
Location: ny
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
Thread
Thread Starter
Forum
Replies
Last Post
mpm86
GS - 1st Gen (1993-1997)
5
04-05-14 09:56 PM
1989, 400, 98, buy, egr, lexus, ls, ls400, modulator, sensor, temperature, troubleshoot, troubleshooting, troublshooting, valve