Have you been able to catch the reading spike on live data? Also assuming you added new style harness for the injection pump? There was an updated harness for those.

 

The factory programming only allows a 3% deviation (High) on fuel rail pressure. Is it possible for your version of Forscan to access these parameters & make changes?

 

Thanks for the replys... I did purchase the MichiganMotorsports wiring harness kit for the pump and ohms everything out. checked good. I will run the data log on the way home tonight and post the screen shot. I think Toque will allow me to do that.

TD-5 - where is that located? which software are you using ? If needed i can order the IDS clone.

Thanks all.

 

That is from the old original H&S platform, you could buy their Maximum Calibration & Control program and do custom tuning . Unfortunately H&S no longer exists. Possibly IDS would allow access & the ability to change factory parameters?

 

Alright thanks for the piece of info. Ill look into it more once i run the data log this evening. This truck is tuned with EZ LYNK and ole joe and harris closed all the good shops. Let me gather some more info for the group and ill post back this evening. Thank you

 

Would need tuning software to alter the allowable difference.

 

Alright got some trip data to look at and it does appear to have some high values in it. even above the mentioned 8%. below is a screen shot and then i have attached the 2 files.

 

Here is the Trend data in a chart format.

 

So ,...is desired and actual running together on the pressures ?
or deviating
can we assume there is an error code popping ?

Did you replace the harness inside the pump ?
known chafing spots there

I would suggest not messing with the tune , until you have the engine running correctly

 

Yes, error code is popping due to the deviation.

Deviation is somewhere around 11000 psi desired and actual is 16000psi. showing upwards around 45%. normal runs under that are around 3-6%

I was not planning on messing with the tune. I would have to go and buy another set of them for Ezlynk.

Was more looking for direction on weather it is a pump issue or fuel rail pressure sensor issue. The harness was brand new out of packaging for both fuel pump and injector harness. I did install the zip tie holders and ohm the wiring harness out to make sure it was good during assembly. The only thing harness wise is the little pigtail jumper was not replaced.

Thanks,

 

Sorry forgot to mention, engine is running perfectly fine just showing CEL for High rail pressure

 

Rail sensor maybe , but not common
Throttle valve in the pump is more likely
several problems with the internal harness rubbing and giving a false signal to the throttle valve
I suppose the throttle valve could be sticking some as well

Low pressure is more of what I run into , rather than too much pressure

Since the truck is "unknown" to you -- hard to know what is "normal" for the current tunes
tho , shouldn't be throwing a code

 

Thanks for the info Hydro, yes from what i have been reading for some time on these forms is low pressure and no starts, etc.

Is the throttle valve sticking going to cause the pump to implode? or would i be alright driving it to see if it clears up in the next 250 miles or so?

I think before i go getting to crazy with the pump, ill look into going with a set of tunes from Great White tunes and get a fresh set that i know what they are.

 

Should be fine

 

Definitely more than a momentary deviation of more than 3%. Could be the fuel rail pressure sensor, the wiring to the sensor, or the High pressure fuel pump pressure control valve (PCV). Unfortunately the PCV on the pump is not serviceable and the complete pump must be changed out. The wiring to the HPFP should be good as you mentioned that harness/gasket was replaced.

 

TS-5 thank you, i am going to start with the Fuel Pressure sensor OEM. Then if that doesn't I guess ill have to get back into it and order a reman pump.

Thanks all for the info.

 

Is this a 6.4? Can you change pump without removing cab?

 

Yes, 6.4. I did change the FRPS and no change. I am going to order the pump this week and change. I got the IDS software in and ran the High Pressure Test and the pump sounds like **** up around 18000-25000 psi. Did pass the test though but you can def here the change in sound.

 

I have a 2010 F350 with 6.4. Throwing High pressure fuel rail code when towing. Have been told you have to remove cab to change fuel pump? Can you confirm

 

Nothing to the engine including removing it has to have the cab off ... Depending on what your willing to deal with. To removed the pump, you gotta take the driver side crosspipe thing off the valve cover. Degass bottle and battery trey. Take about a hour. Then the fun part begins. The two up pipes the go-to the turbo have to remove 6 bolts. 1/4 inch ratchet is going to be your friend. 8mm short. Then 2 bolts for turbo and drain lines. Then she is right there and easy to deal with. If you having problems with the up pipes don't be afraid to loosen all cab bolts and remove the front 6 and leave the back 2 threaded in about a quarter turn then rise a little to give you some room. Don't need much but it is going to fatigue your hand because you can only turn a little each time but can be done. Not hard at all just can be frustrating.