EGR Solenoid Connections

[Robjs111]

1996 Bronco egr vacuum solenoid connections question.

With solenoid filter end pointing down top vacuum connection is to vac source and bottom to egr?

Thanks.

Rob

 

[miesk5]

Yo Rob,
Welcome to our Bronco site!


●
ASAP, find out if speed control recall work, if equipped was completed. If you still have concerns about Recalls, please contact the Ford Customer Relationship Center:
US: 800-392-3673 | CA: 800-565-3673
Note: 3673 spells "FORD" on phone keys
For the hearing- or speech-impaired: Please contact the Telecommunication Relay Service by dialing 71
... have VIN ready.
"Summary: ON CERTAIN PICKUP TRUCKS, PASSENGER VEHICLES, SPORT UTILITY VEHICLES, AND MOTOR HOMES CHASSIS, THE SPEED CONTROL DEACTIVATION SWITCH MAY, UNDER CERTAIN CONDITIONS, LEAK INTERNALLY AND THEN OVERHEAT, SMOKE, OR BURN. THIS COULD RESULT IN AN UNDERHOOD FIRE."
To confirm current status, use this guide by jowens1126 @ 93 & 94-96 Cruise Control Recalls Repair
Note that the 93 recall is different than the 94-96 recall.

Here's the 1996 Bronco/F-Series Workshop Manual partial

96 Bronco Owner's Guide, Maintenance Schedules & Parts and Accessories by Ford @ Owner Manuals | fleet.ford.com

96 Bronco Dealer Brochure @ https://www.ford.com/cmslibs/conten...sovers/bronco/pdf/96_Ford_Bronco_Brochure.pdf

96 Bronco Quick Tips Brochure Excerpts & some Eddie Bauer options @ 1983 Ford Bronco 96 EB Bronco Brochures pictures, videos, and sounds | SuperMotors.net

Haynes Red Manual for 80-95 Bronco & F Series @ Hanes guide 80-96 bko f series.pdf via BroncMom!

See my mostly recovered View attachment 202203
site by member schwim @ Ford Bronco And F-150 Links - FORD BRONCO

Be well Rob!
Al

 

[Robjs111]

Miesk5, Thanks for the info.

Weird but my 96 bronco running rough when warm and pulled several codes, p0175, p0401 and p0171. Running lean and rich at same time?
Thanks.

 

[Tiha]

Bank 2 has too much fuel and Bank one does not have enough.

Interesting. Wonder if you have a bad O2 sensor, wonder which one is correct? Bank 1 or Bank 2 LOL

Can't say I have seen rich codes very often.

Lean though, could be vacuum leak if it only affects one side?
Other wise lots of reasons for that. Weak fuel pump, running out of fuel recently. Plugged filter. Bad fuel pressure regulator.

 

[Motech]

Bank 2 has too much fuel and Bank one does not have enough.

Usually when I see that, it is an overhead cam engine that has valve timing ******** (ok sorry... Will the opposite of advanced work? No. No it won't) retarted on one side and advanced on the other.

Other times I have seen it is on dual catalyst vehicles where cat is plugged.

 

[miesk5]

Yo Rob,

DTC P0171 (& P0174) Lean Troubleshooting; "...These codes commonly occur on many Ford vehicles, and are set when the powertrain control module (PCM) sees the air/fuel mixture is running too lean (too much air, not enough fuel). Unmetered air can enter the engine through a vacuum leak, a dirty airflow sensor (MAF) that is not reading airflow accurately, an EGR valve is not closing (DPFE) and is leaking exhaust into the intake manifold, an EGR valve that is allowing too much flow (because the EGR differential pressure sensor that monitors EGR flow is faulty and is under-reporting EGR flow). If the problem is not enough fuel, the underling cause may be a weak fuel pump, restricted fuel filter, leaky fuel pressure regulator or dirty fuel injectors..."
The Adaptive Fuel Strategy continuously monitors fuel delivery hardware. The test fails when the adaptive fuel tables reach a rich calibrated limit.

DTC P0171, P0172, P0174 & P0175, P1130, P1131, P1132, P1150, P1151, P1152; 181, 189 (Fuel system lean, Bank 1 or 2), 179, 188 (Fuel system rich, Bank 1 or 2); 171, 172, 173 (HO2S11 lack of switching, Bank 1); 175, 176, 177 (HO2S21 lack of switching, Bank 2); 184, 185 (MAF higher/lower than expected); 186, 187 (Injector pulse width higher/lower than expected) & Possible Causes in MAF C>9ontamination TSB 98-23-10 for 94-96; NOTE: THE FOLLOWING PROCEDURE MAY ALSO BE USED TO DIAGNOSE VEHICLES THAT DO NOT HAVE FUEL SYSTEM/HO2S SENSOR DTCs. Symptoms: Lack of Power, Spark Knock/Detonation, Buck/**** Hesitation/Surge on Acceleration
Source: by Ford via miesk5 at FSB
96 running rich, previously running lean. - FSB Forums


DTC P0175 - System too Rich (Bank 2); "... The Adaptive Fuel Strategy continuously monitors the fuel delivery hardware. The test fails when the adaptive fuel tables reach a lean calibrated limi[t. See Possible Causes for DTC P0171. A SHRTFT-1,2 PID value between -25% to +35% and a LONGFT-1,2 PID value between -35% to +35% is acceptable. Reading beyond these values indicate a failure..."
The Engine Control Module (ECM) detects too much fuel and not enough oxygen in the air-fuel ratio (AFR), resulting in the P0175 code. The code activates when the ECM is unable to adjust for the amount of air or fuel required to return the air-fuel ratio to the established parameters.

P0175 appears when the oxygen sensor in Bank 2 detects a very high condition, or there is inadequate oxygen in the exhaust gases. Bank 2 corresponds to the side of the engine with cylinder number 1 on 6-, 8-, and 10-cylinder engines.
These are the several factors that can cause the P0175 code to appear.

• A clogged or leaking fuel injector
• Fuel regulator failure
• A clogged or defective mass air-flow sensor
• Defective coolant temperature sensor
• Thermostat malfunction
• ECM requires reprogramming
• Unclean or faulty oxygen sensor
• Have vacuum leaks – PCV hoses, vacuum hoses, and the intake manifold gasket
• Issues with fuel delivery
• Inaccurate fuel pressure
• Leaking exhaust

P0401 - EGR Flow Insufficient Detected. The EGR system is monitored during steady state driving conditions while the EGR is commanded on. The test fails when the signal from the DPF EGR sensor indicates that EGR flow is less than the desired minimum.
Possible Perpetrators:
Vacuum supply
EGR valve stuck closed
EGR valve leaks vacuum
EGR flow path restricted
EGRVR circuit shorted to PWR
VREF open to D.P.F. EGR sensor
DPFE sensor downstream hose off or plugged
EGRVR circuit open to PCM
VPWR open to EGRVR solenoid
D.P.F. EGR sensor hoses both off
D.P.F. EGR sensor hoses reversed
Damaged EGR orifice tube
Damaged EGRVR solenoid
Damaged PCM
DPFE Testing in a 96 5.0; "...DPFE comes in as .15 VDC during KOEO test between REF & Ground. TOMCO says it should read 0.45 +/- 0.25 volts for the .55 volt for this original Aluminum type sensor My Ford PCED/EVTM is frozen, so I can't view Ford's +/- values. &, when pulling REF hose off, fine particles fell out of DPFE. So, figuring DPFE Sensor is bad according to Ref voltage and particles... Yes, your voltage of 0.15V on the DPFE line is a typical sign of a bad one. Try to obtain a Motorcraft replacement, as the retail part store pieces don't last..."
Source: by SigEpBlue (Steve) & me at FSB DPFE Hose Source & REF Voltage?

Differential Pressure Feedback (DPFE) TSB 97-22-1 for 95-97 F Series, Aerostar, Econoline, Windstar (Bronco not Listed); miesk5 Note; test info & diagrams/depictions are correct for Bronco as well
Source: by Ford (http://www.stangnet.com/images/stories/docs/sn95_TSBs/97-22-01.pdf)

Testing & Vacuum/Voltage Parameters & pics on both older Aluminum & Newer Plastic Version; MIESK5 NOTE: only 95 5.8L California models & all 96 have the DPFE Sensor instead of EGR Valve Position Sensor (EVP); Ford also calls the DPFE Sensor an EGR Pressure Valve; my 96's Ford pn is F4ZZ9J460-B; new Plastic replacement version is MOTORCRAFT Part #DPFE15 Source: by tomco-inc.com
http://www.tomco-inc.com/Tech_Tips/ttt3

 

[miesk5]

Also,
DPFE Testing & Vacuum/Voltage Parameters & pics on both older Aluminum & Newer Plastic Version; miesk5 Note, Tomco Figure 4 for Plastic Housing version, it shows +/- 0.25 volts; It should be 1.0 +/- .025 volts as desribed in the narrative and in Ford EVTM; "...Access DPFEGR PID (formerly DPFE) with a Scan Tool. PID voltage should be 0.2-1.3 volts..."
Source: by tomco-inc.com