• Welcome to Ecoboost Performance Forum. Please log in or sign up.
collapse

Fuel pump module

Started by Desmond1491, October 22, 2019, 12:19:44 PM

Previous topic - Next topic

6500rpm

I'd back up a bit. The original issue was a "cranks but won't start" complaint with a communication "U" code pointing at the FPCM correct?  Knowing what that "U" code is would be a big help. A dead data line can cause a lot of issues depending on the modules involved, possibly even keeping a module from going to sleep which could explain the battery draw issue.
Without a lot of equipment to work with, a quick and dirty check would be to connect a 12v incandessent style test light between the positive battery post and the positive cable (cable removed), key off, doors closed. If the light is on and "bright" it's a good indication that you have a high parasitic current draw issue that's pulling your battery voltage down. Leave it attached and watch it for several minutes to see if it ever dims down as a module that may be awake goes to sleep. All that's going to tell you though is that you do or don't have a high draw. I think that if you know, or could find out what "U" code was set that led you to replacing the FPCM, and what modules besides the PCM had codes it should help you find out what's going on. Modules need power, ground, and communication. If your FPCM has power and ground I'd start running checks on the data circuit involved and associated modules
2013 SHO PP in Ruby Red Metallic, GTG Billet Grills, Duraflex Racer Chin Spoiler, DriveBright LED Driving/Turn Lights,160 T Stat, MSD Coils, All Royal Purple Lubricants, EPP Gen 2 Duel Intake and hotpipes,3 bar, Gearhead AO tuned!


Desmond1491

The car cranks but the RPM don't move just a little bit off the 0 and that's all

SHOdded

#17
It is worth checking the crank sensor, as it is what sends the tach data to the IPC

Pinpoint Test I: The Tachometer Is Inoperative

Normal Operation
The PCM uses the Crankshaft Position (CKP) sensor to measure the engine rpm. The PCM sends the data to Instrument Panel Cluster (IPC) over the High Speed Controller Area Network (HS-CAN) communication bus to command the tachometer gauge according to the data.

If the engine rpm data is invalid for 5 seconds or less or if the IPC does not receive the engine rpm data for 5 seconds or less, the IPC defaults the tachometer to the last setting, based upon the last known good rpm message. If the IPC does not receive the engine rpm data from the PCM for more than 5 seconds, the IPC sets DTC U0100:00 in continuous memory and defaults the tachometer to 0 rpm.

If the engine RPM data is invalid for more than 5 seconds, the IPC sets DTC U0401:68 and defaults the tachometer to 0 RPM.

NOTE: If DTC U0100:00 is set in the IPC , other observable symptoms may be an inoperative speedometer, temperature gauge or odometer.

This pinpoint test is intended to diagnose the following:

PCM concern
IPC
2007 Ford Edge SEL, Powerstop F/R Brake Kit, TXT LED 6000K Lo & Hi Beams, W16W LED Reverse Bulbs, 3BSpec 2.5w Map Lights, 5W Cree rear dome lights, 5W Cree cargo light, DTBL LED Taillights

If tuned:  Take note of the strategy code as you return to stock (including 3 bar MAP to 2 bar MAP) -> take car in & get it serviced -> check strategy code when you get car back -> have tuner update your tune if the strategy code has changed -> reload tune -> ENJOY!