Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD1999F 150 2WD PICKUP V6-4.2L VIN 2REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTPROM - PROGRAMMABLE READ ONLY MEMORYTECHNICAL SERVICE BULLETINSCUSTOMER INTERESTPCM/ENGINE - INDUCTION BACKFIRE
1999 Ford F 150 2WD Pickup V6-4.2L VIN 2
PCM/Engine - Induction Backfire
1999 Ford F 150 2WD Pickup V6-4.2L VIN 2SECTION PCM/Engine - Induction Backfire
Article No.
99-14-10
07/12/99
^ INDUCTION BACKFIRE - VEHICLES IN MEXICO
ONLY WITH 4.2L ENGINE
^ ENGINE - 4.2L - INDUCTION BACKFIRE - VEHICLES
IN MEXICO ONLY
FORD:
1998-1999 F-150
ISSUE
Induction backfire on accelerations and decelerations during all ambient temperatures may occur on some vehicles. This may be caused by carbon buildup on the intake valves due to high sulfur content in the gasoline and the Powertrain Control Module (PCM) calibration.
ACTION
Reprogram the PCM. If the backfire concern has not been resolved, perform normal diagnostics. Be sure to perform intake valve deposit inspection procedure (carbon blasting with walnut shells) or replace the intake valves with new Intake Valves (F65Z-6507-AA).
Obtain an Authorized Modifications Decal (FPS 8262 - obtainable through DOES II, 25/pkg) and list the date, dealer number, and summary of modifications performed. Select a prominent place adjacent to the Vehicle Emission Control Information Decal suitable for installing the Authorized Modifications Decal. Clean the area, install the decal, and cover it with a clear plastic decal shield.
OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS: Eligible Under The Provisions Of 2 Years/40,000 Km Warranty Coverage For Mexico
OPERATION DESCRIPTION TIME
991410A Reprogram Powertrain 0.4 Hr.
Control Module (PCM)
991410B Extra Time To Inspect 0.4 Hr.
Intake Valves
991410C Extra Time To Clean 2.9 Hrs.
Intake Valves (DO NOT
Use With Operation D)
991410D Extra Time To Replace 8.9 Hrs.
Intake Valves (DO NOT
Use With Operation C)
DEALER CODING
CONDITION
BASIC PART NO. CODE
6507 49
OASIS CODES: 613400, 613500, 613700
99-14-10
07/12/99
^ INDUCTION BACKFIRE - VEHICLES IN MEXICO
ONLY WITH 4.2L ENGINE
^ ENGINE - 4.2L - INDUCTION BACKFIRE - VEHICLES
IN MEXICO ONLY
FORD:
1998-1999 F-150
ISSUE
Induction backfire on accelerations and decelerations during all ambient temperatures may occur on some vehicles. This may be caused by carbon buildup on the intake valves due to high sulfur content in the gasoline and the Powertrain Control Module (PCM) calibration.
ACTION
Reprogram the PCM. If the backfire concern has not been resolved, perform normal diagnostics. Be sure to perform intake valve deposit inspection procedure (carbon blasting with walnut shells) or replace the intake valves with new Intake Valves (F65Z-6507-AA).
Obtain an Authorized Modifications Decal (FPS 8262 - obtainable through DOES II, 25/pkg) and list the date, dealer number, and summary of modifications performed. Select a prominent place adjacent to the Vehicle Emission Control Information Decal suitable for installing the Authorized Modifications Decal. Clean the area, install the decal, and cover it with a clear plastic decal shield.
OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS: Eligible Under The Provisions Of 2 Years/40,000 Km Warranty Coverage For Mexico
OPERATION DESCRIPTION TIME
991410A Reprogram Powertrain 0.4 Hr.
Control Module (PCM)
991410B Extra Time To Inspect 0.4 Hr.
Intake Valves
991410C Extra Time To Clean 2.9 Hrs.
Intake Valves (DO NOT
Use With Operation D)
991410D Extra Time To Replace 8.9 Hrs.
Intake Valves (DO NOT
Use With Operation C)
DEALER CODING
CONDITION
BASIC PART NO. CODE
6507 49
OASIS CODES: 613400, 613500, 613700
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.