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Cleanfire Fuel Injection

TPS Tests

Two tests can be performed to quickly determine if further testing is required.
TEST 1: TPS Idle Voltage
1. Connect Digital Wrench® to the vehicle. Confirm the throttle lever free play is set to specification, and the throttle
cable is not pulling on the throttle plate cam.
2. Click on the DATA GRID ICON to view the current sensor readings.
3. Locate the TPS VOLTAGE reading and compare it to the specification for the vehicle. Verify SENSOR REFERENCE
VOLTAGE is 4.9-5.0 VDC.
TEST 2: TPS Signal Sweep
Utilize the sensor graph function to view the TPS voltage return signal voltage as a line graph.
1. Slowly move the throttle lever in and out. The return signal line should change without any erratic jumps or gaps.
2. If erratic jumps or gaps are encountered, inspect the wiring, and connector pins at the sensor and ECU connector.
3. If no wiring problems are found, inspect the TPS to verify it is securely mounted to the throttle body. If loose, it will
have to be readjusted.
4. Replace the TPS if steps 3 and 4 do not resolve the issue.
4.46
TPS Idle Base Setting Voltage
MODEL
600 DC-CFI Engine
800 DC-CFI Engine
SPECIFICATION
.94-.96 VDC
.93-.95 VDC

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