I have a 2004 Suzuki Forenza and recently I have heard a knocking sound that increses as I accelerate, do I have a rod knock or could it hopefully be something else?
What you have described is a classic description of a rod knocking. The engine is done. Its time to replace or rebuild it. If you choose to have it replaced, I recommend Jasper Engines as they come with a 3 yr/100,000 mile parts and LABOR nationwide warranty. This means if there is a problem you pay nothing. If you have a junk yard engine out in and there is a problem, you will have to pay the labor again.