I've used search, none of the threads I've seen apply to my issue -for the "use search" trolls

91 ls400 120k miles
I get a CEL code 71 if I reset the ECU it will stay off for about 50 miles, and will come on and off every 50-100 miles, I cleaned the little filter under the cap, but it didn't help.

any ideas or helpful experience would be great,

picture is related...the car in question

 

i have the same issue bro, i think i read somewhere that you could try cleaning the throttle bottle and some cases it cleared the EGR cel code. I am going to try that on mines next chance i get. Side question, what kind of mileage do you get with said problem, does it even affected it to normal?

 

When I took my car to the shop to get it worked on they also told me that it was given the egr CEL, he cleard it and I cleaned the filter. It stayed off for a few drives then when on the freeway it turned on when I turned on the cruise control. A few days later i changed air filter, plugs and rear brakes and the light has been off since. I drove to Los Angeles and back from north Cali and the light is still off. I'm thinking it was my plugs ...

 

so it could have nothing at all to do with the actual EGR? Mine started at about 110k

 

Possibly nothing at all. Good Thing I didn't get a new egr valve to replace it. When I checked my plugs they were oxidized a bit so I think that is what t was

 

i think most people try other things or are forced to, because the EGR pipe is prone to getting a break in it, but it is rather a PITA to change

 

I'll take off the intake check the throttle bodies, and check the spark plugs after work tomarrow, I guess I'll go from there

 

Before the code came up I had allready replaced my egr pipe, it was cracked in a couple spots due to overheating