My gu has just started having this problem when its cold starts first time no problems but when its warm can take up to 5 goes at starting would i just need to get the new plate and o ring from nissan to fix this also thinking could be glow plugs as they may not have been changed since new i bought the car about 7 yrs ago from the original owners and it had been really well looked after never missed a service and book all stamped from the same dealer