Bogging down ?

Evening all,

I have a 1.0 micra on an 'X' reg only done 30k miles, which has just had a new MAF fitted as the old one packed up. The car was driven for a few months with it unplugged (by previous owner). It's not a genuine part, just £30 part from ebay with a years warranty and 98.9% good feed back. The car drove fine until it was left for 5-6 hours, when the car was started it felt very slow in the lower rev range almost like my foot was on the brake when on full throttle but would pick up quicker on only half throttle. Tried unplugging the sensor again but the engine stalled pretty much straight away so have plugged it in again and as far as im aware that means its working properly? But once the car had warmed up slightly and opened up abit the car felt normal. I couldnt hear it missfiring so i think the plugs and coil pack are ok. Is there anything else that could cause this, or is it normal?

Any help would be greatly appreciated! Thanks!
 
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