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Warmed it up again, left the throttle thermostat connected, and screwed in the black hex socket thing. Hunting has gone away, and idle speed down to sensible level. In fact, the black hex socket thing was well out, and I had to turn it several turns. It is now screwed up as far as it will go...

So which do I twiddle? The black one? Thanks

Thanks for that. presumably I have to wait for the hunting to stop before I try to set the tickover. Cheers .......and......which is the idle speed adjusting screw? Haynes says it is "situated next to the throttle potentiometer on the throttle housing". All I can see there is a black plastic...

Latest news. New throttle body and distributor arrived. Fitted the throttle body today. Checked the ECU - 55 code. Took it for a test drive. Initial observation is that the misfire and kangarooing have gone, but it is now hunting at idle, which it wasn't doing before. The code is still 55. I...

Went home last night - flew home as if nothing was wrong. Came into work this morning - pretty good but very slight misfire. Checked the codes - first 21, then 12. I reset it and checked the code - 55. Went to the post office this morning, kangarooing all over the place - thought I wasn't going...

Thanks Mr Alienfish360. Very interesting, and if it were mine I would do that. However, as it is my daughter's car, she wants a new one on, as it is £90 -odd rather than the £380 or whatever dealer price. She lives a couple of hundred miles away, so I agree with her - it's worth paying that for...

There's always a chance that I might have zedroed it without knowing when I was poking wires in and didn't know where the LED was. I'll try it again when I get home. Cheers

self-diagnostics Thanks Solarice! I've found it - 4 holes on the side of the ECU. Done the test - comes up with 55 code. However the engine is cold, and I know the car runs OK when cold (not sure if that is significant). I'll try it again when I get home. Thanks!

Thanks Matt1897. When you say 2 10mm nuts, do you mean the 2 hex headed screws fixing the feet of the tin bracket to the floor of the car? That's the nearest this one has. I live in Worcester, so any help would be very much appreciated, please. Thanks also Mr Alienfish360. When it is cold, it...

Yesterday I rashly volunteered to try to sort out my daughter's Micra M reg. 1.0 16v, (K11 I think?) which is misfiring when warmed up, but OK when cold (1st 2 or 3 miles.) Bought the Haynes manuals, and also looked on the web for tips. Clearly the thing to do is to check the self diagnostics...