rev below 800 rpm..

[siblinghk]

could anyone tell me what the problem is as my micra(98) rev below 800rpm to 600 rpm when the engine starts , it also rev unstablely in between 800 and 600 rpm when the car is stopped. i suspected exhuast problem, but the garge people told me there is nothing wrong with it.. i bought the car for just a week, and it has been modified by previous owner: induction kit and lowered. i dont know much about car so anyone knows what the problem is and how to fix it, please tell me.... thanks in advance....

 

[Noddie]

i would try cleaning the plugs. (anyone wonna tell me im talking crap)?

 

[Demarest]

i would try cleaning the plugs. (anyone wonna tell me im talking crap)?

Could be a start, inless its that notourios throttle body problem (which i dont know much about)