Would anyone know the part number for the speed sensor fitted in the gearbox of a mk1 2.3 manual box and would it send a signal to the ecu as im having problem bringing my tick over down when stopping. So far I've changed the following, cam sensor, crank sensor, throttle sensor, maff sensor,water temp sensor,throttle valve, throttle cable and her valve. Just ordered the 3 vacuum valves and map sensor. It's been on 3 OBDII testers but nothing found, she's also on lpg and rpm sits at 3000rpm when you stop in both modes, if you slow engine speed with clutch (brake on) to 1000rpm n let her go she shoots up then settles down at 1000rpm, but sometimes stalls. Don't want to have her put down yet but getting close! Any ideas guys? Viperclive