My 88 cossie stalls when in traffic (at a standstill) after some stop start driving then wont restart again unless i leave it for a while . It also over-revs while idling up to around 2500 then back down again then usually cuts out. My car has gone bonkers , any ideas? As i am in NZ there arent too many cosworth experts but the mechanic says it is dumping too much fuel in and cant figure out why.