For what its worth I have had this before in the warm weather and it turned out to be a faulty 2nd Lambda, I also seem to remember seeing a thread on here about it possibly being the MAF.
Try a local breakers yard for the hinges. They are quite easy to get a hold of. I've replaced mine before, a garage local to me sells and repairs a lot of micras so it was easy to pop in and get them from there.
Makes complete sense to me that it could be maxed out. I think given I've got the patience and the money to spend that I'll get a different throttle body and possibly a new ecu after that if the problem doesn't disappear and failing that a trip to my local Nissan dealer might be on the cards...
I assumed that because the idle rises when electrical load is applied that the idle control valve is working properly. Yeah injectors and plugs have been swapped around too.
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I'm beginning to think that you may well be completely right frank that the issue I've got lies with the ecu. I think I might just take a punt on getting a different ecu. I've seen quite a few on eBay cheap enough. Although they don't come with the black transponder receiver around the ignition...
Hi Paul thanks for the input. Mine is the coil pack version. A late 2002 model, registered in 2003. I've had the injectors swapped around. Spark plugs have been changed and swapped around too, and the problem stays with cylinder 4.
The only time it misfires is at idle. Almost like there's not...
Ah, got you now. Definitely worth exploring. Thanks Frank, I'll let you know how I get on. On the brightside while the misfire disappeared I had the car MOT'd and she passed with flying colours, no rust or nasty oil leaks etc so as you can imagine I'm keen to fix the car and keep her on the...
Thanks for your input Frank, looking at pictures of the coolant pipes on a throttle body they just seem to go through the throttle body, being honest I can't see the point of them but wanted a second opinion anyway.
I have had the coilpacks swapped around on different cylinders and the problem...
Hi Frank, I was wondering if you could weigh in on my post www.micra.org.uk/threads/throttle-position-sensor-help.66968/#post-746860. Appreciated your invaluable help in the past and wondered if you would have any knowledge of what I was asking in my post. Thanks, Rob