Fuel pump relay is not being pulled in. Verified: Fuel Pump relay, Auto Shut Off relay, horn relay, fuel pump, installed new computer module.
Verified correct operation of Auto shutoff circuit, (relay is being pulled in) so cam and crank sensors are ok.
Jumper the N.O. terminals for the Fuel Pump relay and the pump runs just fine and produces fuel pressure. 12V is not present to pull in the Fuel Pump Relay.
Personally I wouldnt bother tracing the wire as it is probably not worth your time, and just run a constant 12v from the battery to the relay on like 10ga wire. There is probably a short somewhere in the system which can be a real headache to find.
Also it may sound dumb, but check your fuses, and the fusible links under the hood. Chances are that they are all fine though, especially if you have dash lights.
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If you are talking about the fuel pump, you have only a few cheap fixes before blaming the expensive fuel pump. The fuel pump relay can overheat and kick out. A new relay could fix this. Autozone.com offers free fusebox layouts and wiring diagrams just for registering your truck with them for free.
Sometimes the horn relay will interchange with other relays. Look at the part numbers and use the horn to test the fuel pump relay. Or switch the 2 relays.
A fuel filter could be clogged and overloading the fuel pump. Put in a new filter.
After that, its a case of testing the fuelpump leads and see if the fuelpump is shut down.
the fuel pump relay performs a slightly different function than the horn relay. If there is a wiring circuit printed on the outside of the relay's you will be able to see the difference.
AS you have "jumped" the fuel pump relay and the vehicle started, then the relay is not providing sufficent consistent power to the fuel pump. It is possible to check the relay using a digital multimeter, that will indicate which side of the relay is failing.
The most expedient method to address the potential and factual problems which you state, is to hook up a hand held :reader" to the car and observe the information given. That will give you a factual baseline to start with.
Gauge fuse runs a fuel module that is installed to correct vapor lock. This module is what is running the pump. This module, called the hot fuel module is mounted on the passenger side behind the dash above the blower motor.
I had the exact same problem with a 91 GM vehicle.I replaced almost everything including the fuel pump. Months later I discovered I had purchsed and installed a faulty fuel pump,new from the factory.That was the last thing I would of guessed. the fuel pump worked when I tested it but would seize when it got hot during regular driving.One day I decided to let the car run in the driveway until it happened.I sat near the car so I could hear the pump run.All of a sudden the pump started to whine and fade on and off thats when the car shut off.I replaced it it a second time and it never happened again.You may have to put a fuel pressure guage on the fuel rail and run the car and watch when it happens.
The neon don't have one, check the fuse and relay's. The fuel pump is also controlled by the Auto Shut down relay (ASD). The power supplied to the fuel pump. Ignition coil, fuel injectors, and parts of the power module is controlled by the logic module through the Automatic Shutdown Relay (ASD). The ASD relay is closed (allowing power to flow through it) when the ignition is first turned on. If the signal from the ignition reference is lost while the engine is running the logic module cuts power to the ASD, which in turn removes power from the fuel pump, ignition coil, injectors and those parts of the power module. This causes the engine to shut down. Good luck and hope this helps.
dave again i just posted you so it is definately fuel related listen to see if the fuel pump turns as described in my last post if it does not you can test the relay by replacing it with a known good relay like the horn if your horn works but your fuel pump does not turn swap em see if the horn works still and if the pump now works. If the pump works and the horn does not reinstal the horn relay in its original position and replace fuel pump relay. do the same with fuel pump fuse as sometimes the fuse looks okay but is not. If you have a test light hook it to ground and make sure both metal tabs on the fuse light the light when the pump is activaed.