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I downloaded the guide relating to re-soldering the dry joints on the air mass meter and took out the air box today only to discover a completely different meter on the car so I guess that was for earlier Micras. I've left it running on the drive for around 45 minutes but no error message yet. The MOT and tax has run out so I'm a bit stuck with that.
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The check engine is lit on the dash but it's been off the road now for a few months so the dead battery has reset that, usually I'd have to drive it again for a few days for the error to show again so when I've done an ECU check for the first time this week after charging the battery it all checked out ok. Like I say it's been like this for about 3 years and passes it's mot each time. There's a total lack of power too in the higher gears and it struggles to get up to 60 in 5th gear on the motorway. When it's heated up and been run for a while it's not quite as bad but still rough. I've had a problem with my Micra for about 3 years which I've assumed was down to the throttle body/air mass meter (?) but I've always put off sorting it out, it starts first time, idles ok and doesn't stall but there's a big issue with the throttle response, when starting in first gear or if stationary and out of gear, pressing the accelerator has the opposite effect, the revs reduce to practically nothing and there's a sound of blowing from the front end of the car (may be the engine bay or underneath), to get it going I have to really drag the clutch and pump the accelerator on and off (to try to prevent it stalling.