hey guys got a problem with my speedo and rev counters when driving normal they work fine but the second you put your foot down they start jumping all over the place? also the other night as i broke for instance for a roundabout it would die and id have to restart it?? dont know if thats related but i dunno lol all i have done recently is change the thermostat, the housing and crack pipe?? problems started the same day as this work was done thanks for your help!! jon