Thread: Intermittent rough idle 89 3.5 efi RR.

Hi Pete, I have had the same problem with a 1991 Disco. I cleaned out the engine breathers in particular the one that goes into the plenum chamber on the left side at the front.
Tim

Thanks Freestyler, as a matter of maintenance I'm going to clean all the breather hoses and flame trap today,it's been a while since I've done it.
I'd be pretty happy if that's all it is!
I'll let you know how it goes.
Cheers, Pete.