Sheon

now i have a new problem with my 90 ls400 the car will not idle at all i have to keep my foot on the gas and rev it to 1000 rpm to keep the car from dieing when im driving and i come to a stop light or anything i must put it into netraul and rev the engine to 1000 rpm or the car will die

also in the engine it sound like something it hitting something i dont know how to explain it sounds like something is lose and its hitting the engine block like a clacking sound??

i did use thermagasket in my car and it did stop the gasket leak for now tell i can afford to do a head job.

please help me out and thanks so much to everyone on these fourms