08 ford 6.4 with PDF delete kit installed.

Mutts · Post by **Mutts** » Tue Aug 16, 2011 6:13 pm

The problem is with the solenoids on the pump and not so much the pump itself. You can not get just the solenoids and that is why you have to replace the pump as per the Ford tsb 11-4-22. The fuel rail sensor is on the right side(or passaenger side bank) fuel rail and the part # is 8c3z-9g756-a. Like I said I have replaced lots of high pressure fuel pumps for the very thing you are talking about, but if you had a scan tool you could check the voltage of the then fuel rail sensor during your concern or take the valve cover off and wiggle the harness to see if voltage changes.

daddygoose · Post by **daddygoose** » Wed Aug 17, 2011 6:15 pm

i have the preditor programmer and it lets me look at live data. what should i look for a and what voltage should be present.

bagger09 · Post by **bagger09** » Wed Aug 17, 2011 6:26 pm

Have you put the stock tune back in the truck

daddygoose · Post by **daddygoose** » Wed Aug 17, 2011 9:38 pm

not all the way i went stock with the preditor but not with the PDF delete tune. still limps with the preditor stock.

Mutts · Post by **Mutts** » Wed Aug 17, 2011 11:08 pm

If the predator lets you, look at fuel rail pressure (frp) . It should be .50 volts key on engine off and if not the sensor is bias. If you replace the sensor wiggle the harness and watch your pid in datalogger, it should not change and if it does you should replace the uvc harness as well. If all this checks out you may have to put a pump in it.

bagger09 · Post by **bagger09** » Thu Aug 18, 2011 4:30 pm

Go into the predator under diagnostics go to watch and record select all 6.4l parameters. Engine has to running you can record every sensor on the engine. The fuel rail sensor is located under pasenger valve cover wire harness plugs in front of cover. You will have to remove some things to get to it. My question is did you clear the code before you original back up back in truck.

daddygoose · Post by **daddygoose** » Mon Aug 22, 2011 3:30 pm

I haven't checked the volts while the motor is off. but running under 1800 RPM it saying 1V if i rev it above 1800 rpm's it moves to 2V yes i did clear the codes.

daddygoose · Post by **daddygoose** » Tue Aug 23, 2011 4:13 pm

checked the truck last night. with key on and motor off the FUEL PRESSURE V reads 1V . i dont have have a FRP on the item list. i looked several times. but still with key on and motor off reads 1V . after starting the truck still reads 1V up till 1800 RPM'S and 2V after that.

bagger09 · Post by **bagger09** » Wed Aug 24, 2011 12:14 pm

Yes the fuel rail pressure is there look for fuel pressure in diagnostics where you record. It will be high pressure readings in kpa you will have to convert to psi. Leave your 4.0 dpf delete tune in install original back up back in truck from diablo. Also check alternator output 13.5 or higher. Also I had the same problem with my truck using 9t13g test crom with 80 hp tune I got the same code p0088 I install stock tune back in truck. Now ford has had issues with frp sensor going bad and leaking fuel into engine oil. Sensor is located under passenger side valve cover.

daddygoose · Post by **daddygoose** » Fri Aug 26, 2011 6:10 pm

Well guys I need help. I bought a new fuel rail pressure sensor but I can't find that son of a gun. I've looked everywhere Can someone send me a picture to help. I have the 08 6.4l

daddygoose · Post by **daddygoose** » Sat Aug 27, 2011 10:15 pm

Bagger09 what type of things are you talking about removing.. wiring or equipment. you say under valve cover. do you have to remove the valve cover to get to the sensor. I received the wiring scematic. but would love a photo of the rail sensor with an arrow pointing to it. i have the new one and cant find one that fits its description. i have found several other sensors.

Mutts · Post by **Mutts** » Sat Aug 27, 2011 11:48 pm

The fuel rail sensor is under the passenger side valve cover. It is the only sensor on the fuel rail. go to this link and watch at 7.28 minute mark and you can watch him plug in the sensor.
http://www.youtube.com/user/srmastertec ... gAlik1-P5E

daddygoose · Post by **daddygoose** » Sun Aug 28, 2011 8:13 am

thanks Mutts. i was hoping this was a simple job replacing the sensor on the outside of the motor. i had no idea i had to remove the valve valve cover completely . No im gona start second guessing myself if i should do this or bite th bullet and take it to the shop for this. anybody have a estimate on what this little job cost. ??????

bagger09 · Post by **bagger09** » Sun Aug 28, 2011 12:15 pm

Yes better to take to a dealer you have to lift cab up to get valve cover off. And you do not just wrench back on to sensor there is a torque procedure 1.5 ft lbs and a 60 degree turn.

daddygoose · Post by **daddygoose** » Tue Aug 30, 2011 8:21 am

well HELL what happend to the good ole days when you could work on these things in your back yard. I guess its time to put the stock exhaust back on and take to the dealer . i guess the good news is, im still getting 16 mpg wihen its not in limp mode.

Thanks everyone for all the help.