Need some help diagnosing my '88 Dakota, which hasn't been starting.
I thought there were two problems, but now I'm not so sure. I checked
and it does have spark. I do have to go get new contacts for the
starter as they are worn and it doesn't connect and crank reliably
right now. I had suspected the fuel pump, since it does have spark,
but after my diagnosis today, I'm not so sure. I'm honestly not all
that familiar with the Dodge fuel system.
Its a 3.9 and looks to have some sort of TBI set up on it with two
nozzles that squirt down the primary and secondary throttle plates.
There are two fuel lines that come up the front of the engine and back
along the intake manifold towards the rear of the carb. There is a
smaller rubber hose that connects one of them to the passenger side of
the carb, and a larger one that connects to the rear of the carb at
about 11:00 (while standing in front of the truck). When I
disconnected the hoses, a small amount of gas came out of each one of
them. More from the larger hose. When I turn on the ignition, fuel
comes out of the larger hose for a second or two. I'd say an ounce or
two in that time. Nothing comes out the smaller hose.
What's normal on this vehicle? How much gas should pump when the
ignition is switched on to prime the carb? Is the second line an
overflow/return to the tank? If so, then perhaps the truck will start
right up once I replace the starter contacts.