On the 89 there is no test port. I purchased a fuel pressure test kit that i hook up in line at the frame rail where the fuel lines to the TBI connect to the fittings via hose clamp. I have since installed an inlline fuel pressure gage at the inlet port for the TBI. I purchased the inlet fitting and gage from CFM technologies. Just for info the TBI needs to have around 11 psi. I think the spec is 9-13 PSI

 

that would explain why i couldnt find it. thank you. looks like im dropping the tank and switchin the fuel pump.

 

Thanks! I had an 89 too! You'll have to put a Tee in the line, here is a cheapie that works fairly well and comes with the tee: Fuel Pressure Tester & Fuel Injection Pump Tester

 

thank you. im currently jobless and dont have much tools/resources to use but it helped alot