TD New Guy
Join Date: Sep 2015
Location: salt lake city
My Ride: 1992 Dodge Daytona
Engine: 3.0 L
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No voltage at fuel pump, but relays and fuses all ok
92 Daytona, 3.0L. Died on me while driving home, now it's parked on the side of a street. Cranks great, but never starts. Poked around with a multimeter yesterday. I'm not seeing voltage at the fuel pump. Rather, I see only a very small voltage, less than 1V, while cranking. I tested this by pulling the connector off and sticking the probes right in. In the PDC every fuse is OK. Tried shuffling relays. The fuel pump relay socket has 12V at the ctrl post, and 12V at the horizontal power post. Even if I try jumping it (horizontal to the opposite vertical) I again see very little voltage at the back of the car.
I'm not really sure how to track this down. Is there a fuse or a fusible link somewhere else? Can it be as simple as a loose connection? I'm gonna go back today with some longer wires for the multimeter and try to figure out which side of the pump circuit is dead. But I don't know where physically on the car are the components in the circuit that are likely to fail.
There's a bit of a history. I had problems with the engine hiccuping or occasionally dying at a light. Replaced the fuel pump, all fuel hoses, fuel filter last summer and *most* of those instances went away. I also suspect my alternator needs replacing, so I thought maybe the hiccups may be misses due to weak spark? Fast forward to this summer, I occasionally hear a buzzing sound coming from the fuel pump. Occasionally takes longer than usual to start, sometimes dies within a couple seconds of starting up but comes right back alive. Now the car won't start at all. Maybe all unrelated, but I'm inclined to think theres some connection.