SOURCE: On a 97 F250. Where is the fuel pump relay located?
it should be the small green relay that is on the inner passenger side fender
SOURCE: f350 fuel pump relay 2004 gas v10
check for power to the pump first ,then if it has power check for earth ,could be immobilisor has cut in..when checking for power to pump use a seperate earth for the meter ,because if the immobilisor cuts in it stops the earth to the relay stopping it from working
SOURCE: I have a miss in my 2003 F250 super duty, replaced
I would say to replace the sensor and see if it helps. I assume you had the truck scanned and that was the only problem. The speed sensors usually relate to the ABS and Transmission shift points.
Both Autozone and Oreillys will scan for FREE. After you replace the sensor, get a water spray bottle and go around all the seams you can find on the engine while it is running. If the RPM changes you have found the vacuum leak that is causing the miss.
There is also another test that can be done electrically. It is the cylinder balance test. This directly relates to the compression of each cylinder.
While all the Diagnostics that showed the fault are accurate, the onboard computer does not tell everything.
Usually it can miss the mechanical issues like a vacuum leak, or a bad valve in a cylinder that is firing good electrically without the whole bank running rich with the unburned fuel from that one cylinder. This is because it averages the total burn rate for each bank.
On the V8 engines there are cavities below the Airhorn for EGR flow. If your V10 is similar you may want to look under the Airhorn gasket and clean the cavities. It should only cost your time and a gasket.
SOURCE: 2005 f250 V10 gas super duty. Cranks but does not
Ok you have no pressure from fuel pump to the injectors and you replaced the pump. Sounds as if you need to check or replace the relays which send the signal from your ignition switch to your fuel pump to engage/shutoff. Warm weather area sorry doesn't really apply unless you're in an older carburated vehicle
SOURCE: 2005 F250 V10 gas Super
probly hav a wiring issue--also chec fuses and relays--inspec fuel pressure regulator in engine area--try to get a diagnostic scan from a mobile mech--a haynes manual is a must for detailed troublshootn
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