What is the best way to test my FPR to see if it is working properly? I have a bad idle and was going through the hoses to see if anything would help, and when I pulled off the hose from the FPR and plugged it, it idled fine.

 

easist way is borrow a pressure guage or just buy one i think b&m sells one that is 20 or 30 bucks that attaches at the fuel filter, or just swap fpr's with a buddy's known good one