Removal & Installation - Ford Ranger Maintaince And Repair Manual

3. Apply battery voltage (approximately 1 volts) and a ground to the EVR solenoid electrical terminals.
Attempt to lightly blow air, once again, through the solenoid.
1. If air does not pass through the solenoid, replace the solenoid with a new one.
2. If air does not flow through the solenoid, the solenoid is OK.
EGR Valve Function Test
1. Install a tachometer on the engine, following the manufacturer's instructions.
2. Detach the engine wiring harness connector from the Idle Air Control (IAC) solenoid.
3. Disconnect and plug the vacuum supply hose from the EGR valve.
4. Start the engine, then apply the parking brake, block the rear wheels and position the transmission in
Neutral.
5. Observe and note the idle speed.
If the engine will not idle with the IAC solenoid disconnected, provide an air bypass to the engine by
slightly opening the throttle plate or by creating an intake vacuum leak. Do not allow the idle speed to
exceed typical idle rpm.
Some EGR valves may be tested using a vacuum pump by watching for diaphragm movement
6. Using a hand−held vacuum pump, slowly apply 5−10 in. Hg (17−34 kPa) of vacuum to the EGR
valve nipple.
1. If the idle speed drops more than 100 rpm with the vacuum applied and returns to normal
after the vacuum is removed, the EGR valve is OK.
2. If the idle speed does not drop more than 100 rpm with the vacuum applied and return to
normal after the vacuum is removed, inspect the EGR valve for a blockage; clean it if a
blockage is found. Replace the EGR valve if no blockage is found, or if cleaning the valve
does not remedy the malfunction.
REMOVAL & INSTALLATION
PFE/DPFE Sensor
This component is found on all engines, and is also referred to as the backpressure transducer.
1. Disconnect the negative battery cable.
COMPONENT TESTING
HOW TO USE THIS BOOK
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