I have a 2002 F-150, 4.2 V6. It has erratic idle when stopping at lights and stop signs. I have replaced )2 sensors, IAC, TPS, plugs and wires and cannot rectify the problem.

Asked by tank1000p Nov 16, 2015 at 09:28 PM about the 2002 Ford F-150

Question type: Maintenance & Repair

replaced IAC, TPS, plugs/ wires and coil pack. Truck still suffers from erratic
idle. Also replaced all 4 02 sensors.

143,755

T_S_T answered 8 years ago

Sound like you need to check all your vacume hose,s and your intake gasket for leaks,

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KenF answered 8 years ago

Especially the PCV valve and elbow, the elbow connecting the PCV valve the the underside of the throttle body often become badly deteriorated and cause a vacuum leak with symptoms like yours.

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I have a 2002 F-150, 4.2 V6. It has erratic idle when stopping at lights and stop signs. I have replaced )2 sensors, IAC, TPS, plugs and wires and cannot rectify the problem. 2 Answers

replaced IAC, TPS, plugs/ wires and coil pack. Truck still suffers from erratic idle. Also replaced all 4 02 sensors.

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I have a 2002 F-150, 4.2 V6. It has erratic idle when stopping at lights and stop signs. I have replaced )2 sensors, IAC, TPS, plugs and wires and cannot rectify the problem.

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I have a 2002 F-150, 4.2 V6. It has erratic idle when stopping at lights and stop signs. I have replaced )2 sensors, IAC, TPS, plugs and wires and cannot rectify the problem.

2 Answers

Your Answer:

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