Fuel pump does not come on when you turn the key to on but it comes on when you crank on it. Any suggestions what to check ?
Try a new fuel pump relay. It should be under the hood in the relay/fuse block. Relays only seldom go bad, so if not the relay, maybe the wiring to or with the relay. Try this: hold your finger lightly on the relay, while someone turns the key to on,not start. If you feel a click, the "coil side " of relay is good. So the problem may be with the power side of relay-either relay is bad or the power feed is missing. If you have a test light or voltmeter, you could test for power at one of the relay's terminals. One terminal should have power at all times, so key could be off, pull the relay, and check for power. If one terminal has voltage (battery voltage), and you felt the click, probably a bad relay. If no power to the relay, key off, then check the fuel pump fuse. The feed for the pump is missing.
If you do not feel a click from relay with key turned to on, either relay is bad, or the signal from the computer to relay is missing, or the ground for the relay's coil side is bad.
Post back with make and model and year if I can be of further help. Good luck.
May 06, 2015 |
Cars & Trucks