Hello we have our EL Falcon 6cyl, recently the car when pulling up to a stop the revs will drop almost stalling, then sometimes the car will do a random rev at idle and low speed.
The car seems to be sluggish when cold and the car does not have its normal responsive.

About 3 years ago we replaced the engine, recently we have replaced the coil.

We are not sure what to do next and we need some help. Can anyone recommend a mechanic in the northern suburbs in Victoria that could help

Thanks