How to test fuel pump relay (Page 2/2) enicho1 OCT 16, 10:26 AM Hello all I need help with my Fiero not starting. When I got the car (1988 Fiero 2.5 w/19k miles), it always started hard. It would crank at least 10 seconds before starting, then run fine. I remember when I owned a 1984 with a 2.5 when I graduated back in 1989, it started with what seemed like barely tap the ignition key. Anyway, this 1988 Fiero I have was running in my driveway, then after about 15 minutes or so, just died out. It would not start again. Plenty of gas in the tank. I started throwing parts at it because I just wanted to get this going. No luck. I replaced the Fuel injector at the throttle body carb. Replaced the Oil Pressure Switch under the Ignition coil pack area (1988 no distributor). Replaced the fuel regulator (although the old one looked fine). Replaced the Throttle Position Sensor (TPS) at the throttle body. Replaced the Idle Air Control Valve (IAC). I jumper the ALDL port pin behind the cigarette lighter, and I can hear the pump run, but it won’t start by doing this. If you spill some gasoline into the throttle body, it starts and runs until it runs out…. It runs maybe like 5-8 seconds or so. Also, once running by spilling some gas into the top of the throttle body carb….. if you steadily keep pumping the gas pedal, the Fiero will stay running… but very badly. … not drivable but runs (if you qualify that as running). It will sputter and feel like the ignition misses badly, sometimes it pops, and the instant you stop pumping the gas pedal, it will die out … and won’t start again I’m thinking it’s a bad Fuel Pump or maybe even a Bad ECM computer (where you need to pull the center console to get at it behind the firewall). I have not checked fuel pressure yet… was hoping something would have worked. I will need to buy a fuel pressure set to get this information. Other than that, I’m stumped Any suggestions? I am really hoping I don’t have to drop the gas tank and replace the fuel pump, but I’m running out of things to try. Patrick OCT 16, 01:44 PM quote Originally posted by enicho1: I jumper the ALDL port pin behind the cigarette lighter, and I can hear the pump run, but it won’t start by doing this. Hearing the fuel pump running doesn't mean there's necessarily any fuel pressure. The fuel filter could possibly be plugged... but more than likely the flexible "rubber" hose inside the tank has rotted and ruptured. Check if you have fuel pressure, but I suspect the tank will need to be dropped. enicho1 OCT 16, 04:08 PM quote Originally posted by Patrick: Hearing the fuel pump running doesn't mean there's necessarily any fuel pressure. The fuel filter could possibly be plugged... but more than likely the flexible "rubber" hose inside the tank has rotted and ruptured. Check if you have fuel pressure, but I suspect the tank will need to be dropped. I’ll replace the fuel filter just in case. I was thinking I had done that, but reading your reply got me really thinking that maybe I didn’t. I just don’t remember changing the fuel filter. Hmm… maybe I didn’t because I need to lift the car to get to it under the passenger rear area. I’m definitely going to change it, but I’m already mentally getting myself up to having to drop the tank. I didn’t even think of the rubber hose rotting or being ruptured. Thank you This does help because it’s a virtual another set of eyes. Thank you again