How can I test the fuel pump?
#1
How can I test the fuel pump?
My Daughters 2005 Magnum just decided not to start one morning. It had be running fine. Starter turns the motor over fine, but it never fires. I have checked the fuel pump fuse and relay, verified fuse 29 is good, pulled and reseated fuse 14, all to no avail. I "think" I can hear the fuel pump when the key is turned on... but my hearing is not as good as it used to be. Is there an easy way to verify the pump is working? Is there anything else I should be checking before calling a tow truck to take it to the dealer? Any thoughts are appreciated!
#5
#6
I guess I'm too old school, but I follow the KISS rule. Fuel, Spark and Air. For fuel, you can disconnect the fuel hose at the rail, put the end in a container, briefly turn the IGN on (NOT Crank so the plugs aren't firing), and if you get fuel, pump is good. Pull a spark plug with plug wire attached, ground it to the block, turn the engine over to see if you have spark. For an engine that doesn't start at all, that'll point you down the right path...Fuel or Spark. Assuming you aren't in a vacuum and have some air
#7
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#8
Agreed....I'm doing a engine swap, and ripped out the computer. Funny, 'cause my day job is working with them
#9
That's funny Robert... I spend all day working with computers too! In fact, I must spend too much time hearing fans hum in the data center as that is the only explanation I can come up with for "thinking" I heard the fuel pump! Got the pressure gauge from Autozone, but could never find a Schrader valve on the fuel rail to attach it. Did the next best thing, pulled the fuel line at the tank and hit the key to the on position for a second or two... and nada. I have a pump on order and expect that to fix it. Thanks again for everyone's help!
#10
That's funny Robert... I spend all day working with computers too! In fact, I must spend too much time hearing fans hum in the data center as that is the only explanation I can come up with for "thinking" I heard the fuel pump! Got the pressure gauge from Autozone, but could never find a Schrader valve on the fuel rail to attach it. Did the next best thing, pulled the fuel line at the tank and hit the key to the on position for a second or two... and nada. I have a pump on order and expect that to fix it. Thanks again for everyone's help!