Hello all, I have a 91 Camaro RS that I purchased recently. It drove fine home for the 30 minute drive through highways and parked fine. Drove it again and it has some issues, it has no power and the sound of it has changed. I have changed spark plugs and nothing. Occasionally it'll run fine but when you go to start it next the problem arises. Any ideas of what it could be and a quick fix without spending a ton? I have checked vacuum lines and for shorts. I have not done anything else. Please help.