hi,hope this helps,nine times out of ten the actual actuator is the part that is leaking gas,that is why they get replaced,do not replace the seals,you can find a good used part with a warranty on ebay,for about $50.00 i did the same thing,when you replace it you will need to readjust your air fuel mixture,this is to recalibrate the new electro hydraulic actuator.good luck,its about $250.00 new