Hello all. I am new to this so be patient. I have an 84 Eldo Convertable and took it to get it smogged here in CA. They could not keep it at the speed on the dyno they needed to. It would take off then slow down. If he gave it more gas it would speed up quite a bit then once again slow down without him adjusting the accelerator. ANy ideas what could cause this?? Thanks:hmm: