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 MANUALSFORD1993E 350 VAN V8-7.3L DSLREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONPINPOINT TESTSDQ - THROTTLE POSITION SENSORDQ - TESTING NOTES
1993 Ford E 350 Van V8-7.3L DSL
DQ - Testing Notes
1993 Ford E 350 Van V8-7.3L DSLSECTION DQ - Testing Notes
NOTE: You should enter this Pinpoint Test only when you have been directed here from Quick Test.
REMEMBER
To prevent the replacement of good components, the following non-EEC areas may be at fault:
- Idle speeds/throttle stop adjustment.
- Binding throttle shaft/linkage.
- Choke/high cam system, if equipped.
This Pinpoint Test is intended to diagnose only the following:
- TP Sensor
- Sensor harness circuits: VREF, TP, and SIG RTN
- Processor Assembly
DESCRIPTION
The Throttle Position (TP) ensor is a potentiometer that provides a signal to the Powertrain Control Module (PCM) that is directly proportional to the amount of fuel being delivered from the fuel injection pump. Unlike a gasoline engine TP sensor, the sensor is bolted to the fuel injection pump and is actuated by the throttle lever.
REMEMBER
To prevent the replacement of good components, the following non-EEC areas may be at fault:
- Idle speeds/throttle stop adjustment.
- Binding throttle shaft/linkage.
- Choke/high cam system, if equipped.
This Pinpoint Test is intended to diagnose only the following:
- TP Sensor
- Sensor harness circuits: VREF, TP, and SIG RTN
- Processor Assembly
DESCRIPTION
Throttle Position Sensor:
The Throttle Position (TP) ensor is a potentiometer that provides a signal to the Powertrain Control Module (PCM) that is directly proportional to the amount of fuel being delivered from the fuel injection pump. Unlike a gasoline engine TP sensor, the sensor is bolted to the fuel injection pump and is actuated by the throttle lever.
RENDER: 1.0x
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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.