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 MANUALSFORD1985E 150 VAN L6-300 4.9LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMIGNITION TIMINGADJUSTMENTSDURASPARK II
1985 Ford E 150 Van L6-300 4.9L
Duraspark II
1985 Ford E 150 Van L6-300 4.9LSECTION Duraspark II
TIMING ADJUSTMENT
- Place transmission in Neutral or Park with A/C Heater in off position.
- Plug vacuum hoses from the distributor vacuum advance connection at the distributor.
- Connect an inductive timing light.
- Connect a tachometer.
- If the vehicle is equipped with a barometric pressure (ignition module number -12A243-) disconnect it from the ignition module and place a jumper wire across the pins at the ignition module connector (yellow and black wires).
- Start engine and allow to reach operating temperature.
- With engine at timing rpm, check or adjust initial timing to specification. Specifications
- Unplug and reconnect vacuum hoses.
- Remove jumper from ignition connector and reconnect if applicable.
- Place transmission in Neutral or Park with A/C Heater in off position.
- Plug vacuum hoses from the distributor vacuum advance connection at the distributor.
- Connect an inductive timing light.
- Connect a tachometer.
- If the vehicle is equipped with a barometric pressure (ignition module number -12A243-) disconnect it from the ignition module and place a jumper wire across the pins at the ignition module connector (yellow and black wires).
- Start engine and allow to reach operating temperature.
- With engine at timing rpm, check or adjust initial timing to specification. Specifications
- Unplug and reconnect vacuum hoses.
- Remove jumper from ignition connector and reconnect if applicable.
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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.