BOB engine tickover silly! any clues?

[ferdyfred]

Just had delivery of my MK4 cortina fitted with a BOB 2.9 cossie engine mated to a t9 box. My problem is, start her up, goes straight to 2,500 rpm for 5 or so seconds, then drops and wavers between almost cutting out, and racing at 2000 revs. Drove her around the block and stalls when you brake, called the vendor in question, and he suggested a vss to be fitted to the box, would help. Any clues out there would be hugely helpful, Im a carb man!! sensors and witchigrubs Im nay too up on

[brettp]

think you have to drill a tiny hole in the butterfly on the throttle body my mate had the same problem

[ferdyfred]

Thanks, I'll have a try at that monday