Why does fuel pump run constantly when key on?
Why does fuel pump run constantly when key on?
The fuel pump is running constantly when you turn the key on but don’t fire the engine. Normally it will pressure the rail and then stop. Is this a computer issue or could something else be causing this? I’m stumped. I’ve pulled the battery cables nd the chip to see if it would reset itself but nothing helped.
When do you turn on the fuel pump?
Fuel pressure is 39#’s at the rail. My A/F gauge is showing 10:1 as the car gets going at 2000rpm. Pig rich, It’s brutal. The fuel pump is running constantly when you turn the key on but don’t fire the engine.
Where is the fuel pump in a car?
The fuel pump is in the tank on the lower right side. While the started motor is located just above the transmission on the lower left side where you have your dot. Normally if the starter relay it stuck, the starter will continue to run even with the key off.
What happens if there is no RPM signal on fuel pump?
If it sees no rpm signal, it assumes the engine is off or has quit running and shuts off the fuel pump. This is a safety measure so the fuel pump doesn’t keep running in the event of an accident, and the intertial shutoff switch isn’t tripped to shut off the flow of fuel to prevent a possible fire.
The fuel pump is running constantly when you turn the key on but don’t fire the engine. Normally it will pressure the rail and then stop. Is this a computer issue or could something else be causing this? I’m stumped. I’ve pulled the battery cables nd the chip to see if it would reset itself but nothing helped.
Fuel pressure is 39#’s at the rail. My A/F gauge is showing 10:1 as the car gets going at 2000rpm. Pig rich, It’s brutal. The fuel pump is running constantly when you turn the key on but don’t fire the engine.
The fuel pump is in the tank on the lower right side. While the started motor is located just above the transmission on the lower left side where you have your dot. Normally if the starter relay it stuck, the starter will continue to run even with the key off.
How can I Trick my fuel pump into running?
To trick the fuel pump into running, find the ECC test connector and jump the connector in the upper RH corner to ground. If the fuse links are OK, you will have power to the pump. Check fuel pressure – core. Fuel should squirt out, catch it in a rag. A tire pressure gauge can also be used if you have one – look for 37-40 PSI.
Is there a check engine light on an 86-88 Mustang?
There is no functional check engine light on the 86-88’s except possibly the Cali Mass Air cars. The STI has a gray connector shell and a white/red wire. It comes from the same bundle of wires as the self test connector. 89 through 95 cars have a working Check Engine light. Watch it instead of using a test lamp.
To trick the fuel pump into running, find the ECC test connector and jump the connector in the upper RH corner to ground. If the fuse links are OK, you will have power to the pump. Check fuel pressure – core. Fuel should squirt out, catch it in a rag. A tire pressure gauge can also be used if you have one – look for 37-40 PSI.
There is no functional check engine light on the 86-88’s except possibly the Cali Mass Air cars. The STI has a gray connector shell and a white/red wire. It comes from the same bundle of wires as the self test connector. 89 through 95 cars have a working Check Engine light. Watch it instead of using a test lamp.
