Fuel ressure regulator may be bad.
As long as the engine is running, this is normal.
try your idle control valve also your fuel pump i had a problem similar to yours and it was the fuel pump
Weak fuel pump? Plugged fuel filter?
a fuel pump is already running all the time, it is what makes the car move. but if the timing is off or the carbarator is clogged it will make the the same basic problems for the engine as a fuel pump.
The Galant has a continues fuel pump. Meaning, I think, that it runs all the time as soon as the ignition is turned on.Excess fuel (fuel that is superfluous to the correct running of the engine, is returned to the tank by means of a fuel return line.In the process this ensures a constant fuel pressure (which is monitored by the EMS) at all times.Hope this answers your question.
The fuel pump for all Astros is IN the fuel tank. You will have to safely drain the tank to get at the pump. Replace the level sensor at the same time.
The hose connects to the pump itself inside the tank is probably bad. So even though its pumping, its just dumping it right back in the tank. I own a shop and i see it all the time
If the engine is running, this is normal. If the engine is turned off and the pump continues to run all the time there is a problem, possibly a faulty fuel pump relay.
On a 1991 S10, a fuel pump that runs continuously could be caused by a faulty fuel pump relay, a malfunctioning ignition switch, or a short circuit in the wiring. Additionally, if the fuel pressure regulator is stuck open or there is a problem with the fuel injection system, it may also cause the pump to operate continuously. Checking these components and connections can help diagnose the issue.
This is normal for electronic fuel injection.
As long as the engine is running, this is normal.
A fuel pump switch is just a switch to shut of an electrical fuel pump or a electrically controlled fuel pump.There are several control systems for this switch:Most modern cars have an impact triggered fuel pump cut off switch. This is so the car won't burst into flames after a crash.Many cars have an oil pressure triggered switch so if the engine runs out of oil the engine stops.Virtually all modern car have a system where the engine computer runs a fuel pump relay.