Won't run Sounds like no fuel when accelerating

[bubba32963]

I hope someone on this forum can help.  My 1995 5.0 Bronco just died going down the road and would not restart.  Have replace the timing chain and gears, TPS, Fuel Regulator, Distributor, Ignition control module.  It has 35-45 psi fuel at the rail, the TPS is getting 5.0 volts, EGR is clean, ICS is clean and working,  When started the engine will not accelerate, sounds like it has no fuel.  We have tried everything we can think of but are about out of ideas.  Hopefully someone can give me another direction to look. 

 

[miesk5]

yo Bubba,

WELCOME!
 

Have you or a shop checked for Diagnostic Trouble Codes (DTC)s?
If not;

 Suggest you try a Self Test for Diagnostic Trouble Codes (DTC)s by my pal, BroncoJoe19

http://broncozone.com/topic/14269-code-reader/?&pid=74587&mode=threaded

The engine temperature must be greater than 50° F for the Key On Engine Off (KOEO) Self-Test and greater than 180° F for the Key On Engine Running (KOER) Self-Test.
Run it around to heat the engine up and shift thru all gears incl Reverse. Then turn off all accessories/lights, etc.

Make sure A/C is off and transmission is in Park (automatic) or in Neutral for a Manual & release clutch.

Do Key On Engine Off (KOEO) portion first.

And Post any found here according to:
KOEO
&
KOER
 

Also the Check Engine Light (CEL) comes on when the electronic engine control system is not working properly. The check engine warning indicator comes on briefly when the ignition switch lock cylinder is turned to ON, and should turn off when the engine starts. If the check engine warning indicator does not come on when the ignition switch lock cylinder is turned to ON or if it comes on while the vehicle is moving, the system is malfunctioning

If the CEL does not light up at all when starting it; then suspect that bulb is burnt-out or loose, socket was damaged by PO or shop, etc. or someone removed it, which does happen, unfortunately.
 

Same for Amber ABS lamp in Instr Panel.. The 4-wheel anti-lock brake system is self monitoring. When the ignition switch is placed in the RUN position, the anti-lock brake electronic control module will perform a preliminary self check on the anti-lock electrical system indicated by a momentary illumination of the amber ABS warning light in the instrument cluster. During vehicle operation, including normal and anti-lock braking, the anti-lock brake electronic control module monitors all electrical anti-lock functions and some hydraulic operations.

 

This is by Ford for 94;

Powertrain Control/Emissions Diagnosis 1994 On Board Diagnostics I-A SECTION 7A: EEC-IV Intermittent Fault Diagnosishttp://www.thedieselstop.com/faq/9497faq/maint/vra/leftside=vras7al.htm&rightside=vras7ar.htm

EEC-IV MONITOR: Symptom Charts — Chart 8
 

STALLS/QUITS http://www.thedieselstop.com/faq/9497faq/maint/vra/vra07014.htm

 
Possible Causes Visual/Mechanical EEC Air/Vacuum

• Check vacuum lines for leaks or wear.
• Check air intake system.

• TP sensor
• IAC solenoid
• MAP/BARO sensor
• MAF sensor
• IAT sensor

Ignition

• Check distributor cap, adapter, and rotor.
• Inspect spark plugs and plug wires.
• Check ignition switch.
• Check ignition coil for voltage.
• Inspect ICM for damage.
• Check for presence of anti-theft devices.

• Ignition System: PIP circuit
• SPOUT circuit
• IGN GND circuit

Fuel

• Check for correct fuel pressure.
• Check IFS switch.
• Check for fuel contamination/quality.
• Check fuel filter.
• Check fuel lines for water, dirt, or rust.
• Check for low fuel level.

• HO2S(s)
• Fuel Pump System: FP circuit
• FPM circuit
• FP relay

[*]FPRC solenoid
[*]Fuel Injection:

• INJ 1, 2 (MFI)
• INJ 1, 2, .. (SFI)

Power and Grounds

• Check for low battery voltage.
• Inspect electrical connections, wires, and harnesses.

• EEC Power: VREF
• VPWR/EEC power relay

[*]EEC Grounds:

• SIG RTN
• PWR GND
• CSE GND

Other

• Check engine coolant level.
• Check thermostat for proper operation.
• Check EGR valve sticking.
• Check for moisture entry into PCM.
• Check camshaft timing and cylinder compression.
• Check for restricted exhaust.

• ECT sensor
• EPC solenoid
• EGR Systems: EGRT, EVP, DPFE or PFE sensor
• EGR solenoid(s)

[*]A/C Systems:

• ACC, ACCS, WAC, ACD or ACON

[*]TCC solenoid
[*]BOO circuit
[*]BLR circuit
[*]DEF circuit
[*]HDL circuit
[*]MLP sensor
[*]PNP signal
[*]CPP signal





Symptom and Continuous DTC Charts — STEP 8 

In this step, select one of fourteen symptoms from the chart below. If a Continuous DTC is occurring, go to the Continuous Diagnostic Trouble Code (DTC) chart listed below. After the symptom or DTC is selected, you will be directed to the appropriate visual/mechanical checks and EEC checks. Continue to STEP9 - Road Test Set-Up.

http://www.thedieselstop.com/faq/9497faq/maint/vra/vra02014.htm#vra02chart9

(and Stalls/Quits is best Condition that applies to your issue) & unfortunately, I do not have the Diagnostic Subroutines cited.

Driveability — Performance While Driving Concerns Stalls/Quits
Acceleration 607500 9   Cruise

 

[bubba32963]

Thanks miessk5, I am not getting any codes, just 111 for normal.  Cannot seem to find any vacuum leaks.  I am not sure what to check next.  Really acts like it is out of gas.  It will start and idle extremely bad for a few seconds and then die, trying to feather the accelerator it sucks air but seems to get no fuel.  I have searched every where for the proper fuel pressure but all I find is 30 to 45 PSI, that is what I have my injectors are getting power and seem to be cycling like they are supposed to.  Just at a loss for what this could be.

 

[miesk5]

yo,

Ck tat new FPR for vacuum &

Pull vacuum line off  Fuel pressure regulator; any gas or aroma of gas, indicates diaphram has ruptured, R&R FPR

FUEL PRESSURE ENGINE RUNNING 30-45 PSI  KEY ON, ENGINE OFF 35-45 PSI  Maximum fuel pressure is obtainable at WOT or the vacuum hose removed from the fuel pressure regulator

see my Vacuum Leak Test

http://broncozone.com/topic/23994-90-58l-getting-continuous-code-33-and-running-code-44/

Includes possible leaks in HVAC sys incl under dash...etc

--- from 94 Ford PCED OBDI-A Manual

EXCERPTS; READ MORE @

http://www.thedieselstop.com/faq/9497faq/maint/vra/leftside=vras9al.htm&rightside=vras9ar.htm

Fuel Pump Circuit Operation
When the ignition is switched to the ON position, it turns the EEC Power Relay on. The EEC Power Relay provides power to the EEC-IV processor and the control side of the fuel pump relay. Power for the fuel pump is supplied through a fuse link or high current fuse attached to the starter solenoid (battery side). From the fuse link or high current fuse, current flow is through the fuel pump relay and Inertia Fuel Shutoff (IFS) switch to the fuel pump. The IFS switch is a safety device used to shut off the fuel pump in the event of a collision. If the IFS switch is "tripped," it must be reset by depressing the white or red button on the top of the switch. The fuel pump relay is controlled by the Powertrain Control Module (PCM).

When the ignition switch is turned to the ON position, the fuel pump will operate. If the ignition switch is not turned to the START position, the PCM will shut the fuel pump off after approximately one second. The PCM will operate the fuel pump when the ignition is in the START position to provide fuel while cranking.

After the engine starts, the PCM will continue to operate the fuel pump unless the engine stops, engine speed drops below 120 rpm, or the IFS switch is "tripped."

System DiagnosisNote: Grounding the FP lead at the DLC will allow the pump to run continuously with the ignition switch on.

 

Figure 15: Data Link Connector (DLC)

 

[miesk5]

Wiring Diagrams (Partial, Bronco similar) in95; EEC, Start/Ignition, EFI/Fuel System, Emissions, E4OD, (+ clutch interlock switch), etc. from Electrical & Vacuum Troubleshooting Manual (EVTM)
Source: by Ford via Ryan M (Fireguy50)

http://web.archive.org/web/20101201005456/http://fordfuelinjection.com/files/bronco_1995_25-01.gif

PCM & FP RELAYS & PCM (SWAP WITH HORN RELAY IF HORN WORKS; check for corrosion in realy socket(s)

http://web.archive.org/web/20101201010019/http://fordfuelinjection.com/files/bronco_1995_25-02.gif

FUEL INJECTORS & PCM

http://web.archive.org/web/20101201005237/http://fordfuelinjection.com/files/bronco_1995_25-06.gif

Inertia Switch to FUEL PUMP

CHECK FOR Intermittents (bad /Loose ground at G100 - Ground Locations & Diagrams in 92-96; (pump and fuel level sender share connector C441 @ rear cross member) G100 @ LH front of engine compartment on upper radiator support & G200, Instrument Cluster ground is inside passenger side kick panel

with meter; do what Ford describes as a wiggle test)

 

[bubba32963]

I can get the truck to start, Idle is poor, severe smoke from exhaust, when holding throttle to wide open I get a severe surge. Engine revs up then stalls then back to high rev, eventually dies.  Changed the IAC valve and regulator again as suggested by Ford still have the same issue.  When grounding the FP lead I get the same response. I am thinking maybe the PCM could be bad, even though I get voltage from it.

 

[bubba32963]

I have determined the coil is firing continuously but the distributor is firing to the cylinders very randomly, when the engine revs I get spark to the plugs when it stalls out the spark goes away, any thoughts on what this could be, I have already changed the Engine control module.

 

[bubba32963]

Thanks for all of your help.  I replaced the cap and rotor, new plugs now everything is good.  Sometimes we over look the simple things.