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Sorry for the delay, have had to do some work. Find the ECU, probably beside the throttle pedal behind the trim. Remove trim, make yourself vey small and double jointed and remove the multi connector to the bottom of the sec, it has a small retaining clip furthest away from you. Once removed...

Did you try resetting the ECU?

Guiness. I had a similar problem on my Disco 1 3.9, I had also changed to cats. Try disconnecting the ECU for half an hour, this will force it into it's default mode and remove the previouse data it is running on. Whilst mine is not perfect now (I think I need to look at the MAS) at least it...

As no one replied with any suggestions I read the Lucas ECU hot wire spec and decided to try something radical. I disconnected the ECU for half an hour, reconnected and 'hey presto' it seems to have mainly cured the problem for the moment. Still not 100% right though so will probably try to test...

My 1994 Disco has developed a new problem, no revelation there. Recently when cold it will start but as soon as you try to give it some gas it coughes/splutters and usually stalls. If you start it and leave it to tickover it will run for a minute and then start raising/lowering revs, like its...

Checked that with Landy tool, eg bang the cat box hard and see if it rattles, no reattles just a shower of rust in my mouth. Mike

Thanks, checked their site but a bit generic. The knocking is directly related to the rpm so if I discount big ends etc it must be on the input side of the box. Mike

Disco 1994 3.9 140K. Have just bought this as a weekend car to abuse and scare small animals and badgers :eek: on the lanes in our area as the 2.5TD wasn't loud enough. There is a knocking sound which at first sounds like the big ends but spookily is coming from the auto box. I suspect it is...