So I have a few problems and could use some help I have this 1973 thunderbird it is my first car and heve it for about 5 years now but 3 years ago I rebuild the motor and since than never got it running until last week and took it for the first drive today.
but it makes a really loud hissing noise in drive and in reverse and I can't figure out where it comes from it sounds like somewhere under the hood on the left side it does not have any vacuum leaks I smoked it out a few times to make sure.
And the other problem is it's running high rpms but not immediately after starting it but after I press the gas pedal and it won't come down only after shutting it of a few seconds.
Any help or tips would be great.
(Sorry if not Al sentence make sense English is not my first language I'm dutch)
Thanks already for the help.