anybody have any idea why my rs ticks over perfectly but when I go to drive it splutters and pops and bangs and is ready to cut out,
Also the abs light flashes when it splutters I got the aa out to tow me home and left ignition on so I would have power steering but as soon as the car started moving the abs light came on and died again, it doesn’t seem to want to tick over when it’s moving

 

Shamelessly stolen from another post:
The Teves (IV) ABS System on Mk5/5b/4x4 tests in two stages.

When you first turn the ignition on to pos II the ABS does as self test, and you get a characteristic "CLICK" from under the bonnet when the pump/valve assembly powers up. If you don't get this click, it could be a faulty pump/valve unit or the wiring between that and the ECU. Or the ABS pump/fuse at the fusebox.

The second stage of the test starts when you drive off fowards and exceed 5mph(if I remember rightly). The ABS knows you are going this fast because of the Hall Effect sensors on the front wheels. Now the ECU runs a test on the valve assembly and very quickly pressurises the different hyraulic circuits. If something fails at this stage the ABS light will illuminate. This is often mistakenly diagnosed as ABS sensors.

To summarise:
Light doesn't illuminate at all: Possibly faulty ABS module, blown system fuse/relay, blown bulb, or blub removed by unscrupulous car dealer trying to diagnose a fault.

Light illuminates immediately but won't go out: Faulty pump unit or pedal switch. Disconnected or faulty Hall effect sensor. Faulty wiring harness or fuse box.

Light illuminates after moving off: Blown pump fuse/relay. Faulty or dirty Hall effect sensor. Faulty valve assembly.