hello, my head gasket blew on my mg zr recently its a 52 plate so i bought a new which only had 17000 miles on out of a 55 plate i got someone to put the engine in for me and we it came bk it was running again but the engine kept revving by itself to a bout 3k revs without touching the throttle then sometimes was cuttin out at junctions etc in first gear this continued for about three days after and then it cut out completely and it felt like there was no power so i tried to fix the problem changed...
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