1995 Bronco engine RPMs drop when turning the wheels... stalled this morning

mespig

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Hi all! been reading this forum for quite a while - it's unbelievable the detailed information that gets posted! Thanks to all those who help.

I have a 1995 Bronco I've owned since new. Haven't done a lot to it besides regular maintenance. It's an XLT with a 351W and limited slip diff so yes, very low gas mileage :)

I've always noticed the engine go under load when turning the wheels at low speed and tight (ie. leaving the driveway or pulling into a parking space) and more apparent when the engine is cold. This morning it actually stalled so makes me think it might be time to address it. I didn't see anything on this forum but a general search turns up recommendations on the TPS, possibly a pressure switch (although this might be only on the 5.0) or just replace the power steering pump. I don't believe any codes were generated but I'll get a reader this weekend and check.

Anyone else seeing similar behavior? Thanks! Mike
 

Tiha

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The Idle air control could very well be dirty or bad. It controls rpms at idle or low speeds. There are some quick and simple tests to do.
I am sure someone else will post it up shortly or I will go find it.
 

miesk5

96 Bronco 5.0
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Yo Mike,
Welcome!
Try a Self Test for Diagnostic Trouble Codes (DTC)s by my pal, BroncoJoe19 @ Code Reader
PCM stores the Self-Test program in permanent memory. When activated, Self-Test checks the EEC system by testing memory integrity and processing capability, and verifies that various sensors and actuators are connected and operating properly.
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 including Reverse. Make sure A/C is off and transmission is in Park (automatic); or in Neutral for a Manual & release clutch. Then turn off engine, all accessories/lights (close driver's door) , etc.

Do KOEO test First. Post Code(s) here according to KOEO & KOER.
A helper can assist you by counting the codes. Some use their smart phones to record them.

BEWARE OF FAN, BELTS, PULLEYS, HOT HOSES, IGNITION HIGH TENSION WIRES, AND ENGINE COMPONENTS

Or ask local mom and dad parts stores if they will test it for you.
Or purchase a coder reader such as Equus 3145 Innova OBD 1 Code Reader for Ford EEC IV Engines at Walmart & most parts stores.

Here are two of code trouble shooting charts for Stalls:
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Quick Test is the Diagnostic Trouble Codes Test
Idle Air Flow (ISC-BPA) AKA Idle Air Control Sensor (IAC)
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Vacuum Leak; see my LeaK Test in post #11 @ https://www.fullsizebronco.com/threads/help-with-dtc-codes-and-idle.206824/
Excerpt:
"If the leak exists in an accessory unit, such as the power brake, the unit will not function correctly. Or Air Conditioning when in MAX mode may switch to Defrost."


Was speed control recall work, if equipped 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
"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."


1995 Bronco Dealer Brochure @ 1995 Ford Bronco

1995 Bronco Drivetrain, Powertrain Service Manual - Google Drive
&
1995 Bronco Chassis, Service Manual - Google Drive
To switch between folder list & grid views, click the button to the right of the "DOWNLOAD ALL" button in the upper right corner of the window) by HawkDriver

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

Al
 

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