98 buick century wont start FUEL PROBLEM

Turn signal plug should have nothing to do with it not starting. Disconnect the battery for 10 to 15 minutes. Then try again with the key.
When you jumped the solenoid, it would start because the key may have not been in the run position. So the Security light was on, and did not energize the fuel pump.

Disconnect the battery as stated.

if its not getting any fuel, check the fuel pump relay. make sure you have spark also. to check for spark, put plug wire next to a metal part on engine then turn it over. if its firing you will see the spark jump from wire to ground on engine. Good-Day! Check all the fuses in the fuse relay box on the driver's side fender well. Replace any blown fuses and try starting the car. Good-Day!

check for a problem fuel pressure regulator
most are wired to the ECM which is connected to the relay for the pump
it works like this
with low / no fuel pressure the regulator completes a circuit to the ECM
that signal is then sent to a relay to start the pump
when full pressure is reached , the regulator signals the ECM and the relay is turned off hence the pump is not continually running when pressure is not required

Usually if the battery is dead, you will hear clicking. If the battery is good then I would check any Starter fuses/relays. If they are good then I would check for power to the starter solenoid. You can find many youtube videos on how to check this.


Scott
ASE Certified Automotive Technician
ASE Certified MED/HVY Truck Technician

have you put a fuel pressure gauge on it if so how many ponds of pressure does it have also if this is a distributerless car turn engine with a socket see if there is slack in rotation if you turn counter clockwise 1/4 turn stop and turn clockwise if so you more than likely have a stretched timing chain or jumped time

If the fuse and relay is good, and there is power AT the pump, then the pump is bad. Fuel pump power goes through the oil pressure switch but only after engine is running. So there should be power to the pump for approx 2 seconds when you turn key on. There is a RED wire (prime, it will be a single wire poking out near relay) at the fuel pump relay, if you put 12V on that wire the pump should run, IF the wires and pump is good. The GRAY wire powers the pump.

it might just be a clogged filter

Check a few things, check your spark plugs, spark plug wires, also check your fuel filter, fuel pump, but the first thing that you should check is the ground wire from your battery to the engine block

how did you jump the fuel pump relay, by bypassing the relay or by applying power to contact that closes the relay? If you bypassed the relay completely you need to b ench test the relay you can do this easily by using any 12v dc power source. If you tested the fuel pump relay by applying power to the relay and the pump run and developed pressure. I suspect a wiring or ground issue. Good luck

Its not unheard of for a pump to go bad that soon, can you hear it run when you turn the ignition to on position, if not chk. fuse and relay and all electrical connections and grounds, If it does run get a fuel pressure guage and chk. the pressure.