High press pump on rail of my 1988 ford E150 van will not run
We do not get power to pump through normal trial if we jump pump to bat it runs and almost sounds like it is drawing air? we have check fuel pump relay all good there. we are having trouble with the front tank pump wont come on either but the rear does. could the problem be in the switch over valve if so where is it located.where can i get a true wiring dia. for the specific model and yr? any help would be greatly appreciated........thanks dave
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Sometimes, before you hook up the pressure hose, you need to prime the steering box with power steering fluid. Then, when the van is running and the pump is full turn the steering wheel at least three times all the way both ways to pump the fluid through the system. Check fluid level once more to top it off and that should do it.
You have to bleed the system. Not very likely an air lock, since air will come out of the fill bottle sooner or later. You can try removing the rad cap (when its cold) start it up. put heater on high, let it run and check for good coolant flow in the rad. Any trapped air will also come out.
Theres 2 pumps
one in the tank, lift pump, and one in the chassis rail under the driver side.
The one in the tank is cheap, the one in the rail is not.
The one in the tank only produces low pressure to prime the main pump and if it is broken, may not cause that much of an issue except when starting. the one in the rail is a no-start if it fails.
The idea is that the rail pump can supply high pressure for the injectors, so a fuel pressure test at the injector rail will determine which pump is playing up.
Hope that helps
Look for fuel pump relay on firewall..Unplug fuel pump connector closest to fuel tank along frame rail, drivers side. With Key on, check for voltage at fuel pump wireing connecter. not fuel sending unit.
check the pulse on the injector wire with a noid lite or a meter. If no flash then you most likely need a computer. Its called a quad driver in the PCM thats fried. You may have a shorted component that caused it to fail.
Since you say it will run if you add fuel manually I don't suspect the crank sensor because you have spark.