Hi, I have just bought a 2003 Mazda Tribute which I was told cut out in traffic, but it happens to be much worse. It does cut out or misfire at junctions and if you manage to keep it going it runs like a dog with no power. I'm surprised that the engine light doesn't come on and there are no error codes.

If you switch the egnition off and restart it will be fine for a while, some of this seems to correspond to deceleration however it will get bad on my drive if just left to idle.

Any help would be greatly appreciated.