How do you test your fuel pump?

cre · 05-16-2010, 01:17 AM

Generally, you'll hear it flowing through the fuel rail. To really test it you should get a fuel compatible pressure gauge, disconnect the fuel pressure damper and connect the gauge to the rail there and see what the pressure is. I can't remember if you said this car was turbo or N/A, if it's N/A you need to have the AFM plugged in and you'll need to prop open the vane, otherwise the emergency fuel cut switch will prevent the fuel pump from getting power. You should also test the fuel pump relay and resistor.

Most of the trouble shooting proceedures you need to go though are located here:
http://www.cygnusx1.net/Supra/Librar....aspx?S=FI&P=1
Give it a thorough read.

05-16-2010, 01:17 AM	#4
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Generally, you'll hear it flowing through the fuel rail. To really test it you should get a fuel compatible pressure gauge, disconnect the fuel pressure damper and connect the gauge to the rail there and see what the pressure is. I can't remember if you said this car was turbo or N/A, if it's N/A you need to have the AFM plugged in and you'll need to prop open the vane, otherwise the emergency fuel cut switch will prevent the fuel pump from getting power. You should also test the fuel pump relay and resistor. Most of the trouble shooting proceedures you need to go though are located here: http://www.cygnusx1.net/Supra/Librar....aspx?S=FI&P=1 Give it a thorough read. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->