Random low idle (200rpm) w/ code 71

[zeeth2800]

Hey everyone!
I recently replaced the battery and intake hose on my land cruiser and since I have gotten a random low idle. It'll run perfectly but all of a sudden at a stop light idle will drop to 200rpm ish. Occasionally it'll bump itself back up to 700 or so.
Wondering if the code 71 (EGR system) would have something to do with this or if it is unrelated.

Any advice is welcomed!
thank you!

 

[zeeth2800]

Nothing?

 

[Tedward]

Had very similar problem. Lots if reading around this site is available. My problems went away after I replaced everthing egr related except the egr valve. Just about everything I checked failed the fsm tests. Also, I cleaned the egr valve stem. It was sticking, not opening and closing all the way, or moving easily. After cleaning with what I had, Kroil, it moved and sealed up nicely.

 

[danthman114]

My 96 did the same thing after I took the battery out. Drive it for a bit. The computer will fix it.

 

[zeeth2800]

Been about 80 miles and it's still doing it. I think something is actually wrong with it.
I'll take it to my local Indy because I don't have a spare minute

 

[retrofive]

Bad combination of 2 things. 1) battery disconnect will reset the ECU and put it in "limp" mode until it relearns. Mine will almost feel like its dying at stop lights. Typically the computer will re-learn after server power cycles and city + highway driving. 2) the EGR code isn't helping the cause with the ECU in that state if it still is in it.