I have an 03 1.6 focus
it was missing and driveing bad,so i had the plugs leads and coil pack changed but now when the car is idolising ie when at traffic lights or at a standing position,it goes to stall but the rev 'blips' the revs itself to keep itself going. you can feel it doing it,the car and engine shakes. now there are no lights on,cleaned the sensor on the throttle,rechecked the leads and coil pack. i have disconnected the battery for 20mins and left it to warm up and then drove it but nothings working. any advise??