Hi PMV...sorry I didn't notice this thread sooner. What size tip did your gun come with? Probably to late to give any input at this point but thought I'd chime in anyhow.
Most of the inexpensive guns come with large tips...1.7...1.8...ect. These will dump a great deal of paint in a real short time. I try to stick to smaller tips...nothing larger than a 1.3.
For painting cars the 1.4 and 1.5 work nice...nice even paint flow. One thing I've noticed over the years is to be careful when using auto paint on certain types of plastic...auto paint is usually a pretty hot mixture ( chemicaly) and I've seen it melt plastic. Never had trouble with fg though.
Anyway hope your gun is working out for you. My family owns an autobody shop so if you want to ask any questions about paints shoot me a pm...if I can't answer it I can find someone who can.