Onward with the issue, it seems to be more of an issue today and particularly with right at start-up after sitting for a while acts like it wants to die and has a heavy lope...

Along with this, about three days before hand I've been getting a howl out of the intake at idle and its intermittent...

It's going in Monday to get it diagnosed but I'd like to know what I'm going to be set back cash wise...

You know better than to ask "Why's my CEL on" so I'll just guess for the heck of it anyway-

EVAP system component failure causing an intermittent vacuum leak. Parts about $130 from Ford.

But I just pulled that out of nowhere...and I'm probably wrong.

TSB
97-9-5 LONG CRANK - STICKING IDLE AIR CONTROL (IAC) VALVE - VEHICLES BUILT FROM 11/1/94 THROUGH 3/30/96
STALL - AFTER STARTING WHEN ENGINE ALLOWED TO SOAK FROM 1-4 HOURS - STICKING IDLE AIR CONTROL (IAC) VALVE - VEHICLES BUILT FROM 11/1/94 THROUGH 3/30/96

Publication Date: APRIL 28, 1997

FORD: 1995-1996 CONTOUR, CROWN VICTORIA, ESCORT, TAURUS, THUNDERBIRD
1996 MUSTANG
LINCOLN-MERCURY: 1995-1996 CONTINENTAL, COUGAR, GRAND MARQUIS, MARK VIII, MYSTIQUE, SABLE, TOWN CAR, TRACER
LIGHT TRUCK: 1995-1996 AEROSTAR, BRONCO, ECONOLINE, F-150-350 SERIES, RANGER, WINDSTAR
1996 EXPLORER


This TSB article is being republished in its entirety to include the 1995 4.6L Thunderbird/Cougar.

ISSUE:
After a 1-4 hour engine soak time, long crank times and/or long crank to start followed by a stall may occur on some vehicles. No further stalling or rough idle will occur after the engine is running. The long crank and/or stall may be due to the Idle Air Control (IAC) Valve sticking.

ACTION:
Replace the IAC Valve with a revised IAC Valve if no Diagnostic Trouble Codes (DTCs) are present. Refer to the following Service Procedure for details.

SERVICE PROCEDURE

Perform normal diagnostics and correct any DTCs as required by referring to the appropriate year Powertrain Control/Emissions Diagnosis (PC/ED) Service Manual.
If no codes are present, replace the IAC Valve by referring to the appropriate model/year Service Manual, Section 03-14. Refer to the following Idle Air Control Valve Application Chart for proper IAC usage.

IDLE AIR CONTROL VALVE APPLICATION CHART
Model Year Vehicle Engine Revised Part Number
PASSENGER CARS
1995 Escort/Tracer 1.9L F5DZ-9F715-BA
1996 Escort/Tracer 1.9L F6CZ-9F715-BB
1995 Contour/Mystique 2.5L F5RZ-9F715-AB
1996 Contour/Mystique 2.5L F6RZ-9F715-AA
1996 Taurus/Sable 3.0L 4-Valve F5DZ-9F715-DA
1995 Taurus/Sable 3.0L 2-Valve F5DZ-9F715-EA
1996 Taurus/Sable 3.0L 2-Valve F6DZ-9F715-DA
1995 Taurus SHO 3.2L F6DZ-9F715-CA
1996 Taurus SHO 3.4L F6LZ-9F715-AC
1995 Taurus/Sable 3.8L F68Z-9F715-EA
1995 Crown Victoria/Grand Marquis/Town Car 4.6L 2-Valve F5PZ-9F715-AA
1996 Crown Victoria/Grand Marquis/Town Car/Mustang 4.6L 2-Valve F6AZ-9F715-EB
1996 Mustang 4.6L 4-Valve F65Z-9F715-BC
1995-96 Continental 4.6L 4-Valve F5OZ-9F715-AB
1995 Mark VIII 4.6L 4-Valve F3LZ-9F715-AA
1996 Mark VIII 4.6L 4-Valve F6LZ-9F715-AC
1995 Thunderbird/Cougar 4.6L 2-Valve F5PZ-9F715-AA
1996 Thunderbird/Cougar 4.6L 2-Valve F6AZ-9F715-EB

LIGHT TRUCKS
1995-96 Ranger 2.3L F5OZ-9F715-AB
1995-96 Ranger 3.0L F67Z-9F715-AA
1995 Aerostar 3.0L F68Z-9F715-DA
1996 Aerostar 3.0L F69Z-9F715-AA
1995-96 Windstar 3.0L F68Z-9F715-DA
1995 Windstar 3.8L F68Z-9F715-EA
1996 Windstar 3.8L F68Z-9F715-CB
1995-96 Econoline/F-150-350 Series/Bronco 4.9L F68Z-9F715-EA
1996 Explorer 5.0L F67Z-9F715-BA
1995-96 Econoline/F-150-350 Series/Bronco 5.0L F6TZ-9F715-HA
1995-96 Econoline/F-150-350 Series/Bronco 5.8L F6TZ-9F715-HA
1995-96 Econoline/F-150-350 Series 7.5L F6TZ-9F715-GA




PART NUMBER PART NAME
F3LZ-9F715-AA Idle Air Control (IAC) Valve
F5RZ-9F715-AB Idle Air Control (IAC) Valve
F5DZ-9F715-BA Idle Air Control (IAC) Valve
F5DZ-9F715-DA Idle Air Control (IAC) Valve
F5DZ-9F715-EA Idle Air Control (IAC) Valve
F5OZ-9F715-AB Idle Air Control (IAC) Valve
F5PZ-9F715-AA Idle Air Control (IAC) Valve
F6AZ-9F715-EB Idle Air Control (IAC) Valve
F6CZ-9F715-BB Idle Air Control (IAC) Valve
F6DZ-9F715-CA Idle Air Control (IAC) Valve
F6DZ-9F715-DA Idle Air Control (IAC) Valve
F6LZ-9F715-AC Idle Air Control (IAC) Valve
F6TZ-9F715-GA Idle Air Control (IAC) Valve
F6TZ-9F715-HA Idle Air Control (IAC) Valve
F6RZ-9F715-AA Idle Air Control (IAC) Valve
F65Z-9F715-BC Idle Air Control (IAC) Valve
F67Z-9F715-AA Idle Air Control (IAC) Valve
F67Z-9F715-BA Idle Air Control (IAC) Valve
F68Z-9F715-CB Idle Air Control (IAC) Valve
F68Z-9F715-DA Idle Air Control (IAC) Valve
F68Z-9F715-EA Idle Air Control (IAC) Valve
F69Z-9F715-AA Idle Air Control (IAC) Valve

Sounds about right.

Thanks boss...

did some thinking on it, can the IAC Valve be cleaned like an EGR valve???

1970Custom said:

did some thinking on it, can the IAC Valve be cleaned like an EGR valve???

Click to expand...

As long as its not sticking in the electronic part.

Some people say not to bother cleaning the IAC because it's only a short-term fix. I've cleaned mine twice in the last three years- once because it was sticking enough not to idle when cold, and once just for preventative maintenance.

I've never pulled one off a 4.0, but I'm told the 2.3 is the toughest Ranger engine (which would include the 4.0) to get to it on, and it's more nuisance than actually hard. I just blasted mine with TB cleaner.

Ian that's all I'm looking for, just keep it working long enough to get it home so I can get a job and pay for a new one...