Hi all, after having changed my glow plugs twice I am still getting told I have brought counterfit ones. Well today I took all four of them out and shorted them out on a battery with a screw driver.. I know

... well they all in turn glowed well and hot. I had tested them first with just a thin wire and they would not glow or the wire burn out I had thoght they were all duff, but with big driver as buzz bar they glowed. I also took buzz bar off car and tryed each in turn on it and they worked. But put them all back in car and it seems as if only one piston is firering and Ihave to keep key turned till they all fire up.
Once the car has been running she starts again no trouble at all, but I still need to us glow plugs, but then I aways have had to do that she is old car
I have put on another relay and it made no difference. I have also checked for any air leaks...Any one got any Ideals please, Cheer, Pete