Hey guys,
Have an issue with an 97 Civic DX fuel injected.
Cars fuel economy was bad and the alternator was shot. So replaced the plugs, leads, rotor and cap as well as the alternator.
Only thing now is the car idles like its overfuelling or something at idle. Normal driving when warm is fine. The rpm doesnt fluctuate its more like a jerking motion whilst in drive sitting at the lights.

Sorry for the poor explanation, its my gf's car and I am out of town at the moment so can only go of the explanation I am given.

The cooling system hasnt been affected so I am assuming there is no air in the system.

Possible thoughts are maybe the IACV? Fuel Press Reg??

Any ideas would be appreciated.

Thanks gurus!