The fuel filter is a standard part available at almost all auto parts stores. Fram has been proven to be of very poor quality with Purolator and Wix or the NAPA brand being top of the line. Spring for the better quality ones.
I've only owned 1 Duke Fiero and never had to clean the throttle body even though it had sat for more than 4 years when I got it. The mistake I made was not cleaning the tank. That mistake caused the fuel pump to fail, the fuel filter to clog, and the fuel injector to clog. And that was before I even got it on the road.
We replaced the fuel pump and filter and cleaned the horrible mess out of the tank and I assumed everything was good. The car was hard starting, had no power, and ran very poorly. When I noticed the injector had an erratic spray pattern or no spray at all, I removed it to clean it. Not paying attention to how things came apart, I put a gasket or seal back in the wrong place and when I turned the ignition on it sprayed fuel everywhere. So, if you remove the injector be sure to lay parts out in order for reassembly.
