Do you mean the plunger in the metering head? They can be freed up by soaking the unit in acetone overnight. Mine was like this also. Remember to remove the rubber o-ring first! Martin johnpetticrew wrote: > Hi all , well have half stripped the engine of my car, looks like a > complete > rebuild now and will need a new jetronic as the needle is seized > in!!!! bad > thing is i can't locate one in the Leeds area but will keep trying > cos i'm not > paying the price bosch want for a new one(only just pick my jaw back > of the > floor) if any one knows where i can get one please let me know , > many thanks > John....