hi every one i am new to this site i have a 1995 grand prix 3.1L. When i start this car after it has set over night it has a knocking sound, After about 5 mins of running it will stop knocking. Does anyone know what this could be i know that alot of the 3.1 has the same problem. I am taking it in to get upper and lower intake manifold gaskets, and headers put on i know the lower is leaking and i heard this could be making a knocking sound?
I am getting the headers and a cold air intake put on, what elce could i do to get some noticable horsepower out of it?
