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SportTrac Discussion
Engine & Drivetrain
4.6L Pinging at low RPM
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<blockquote data-quote="Richard L" data-source="post: 1026164" data-attributes="member: 52972"><p>Carbon may be building up in the engine that requires a SeaFoam application of the MAF may need cleaning.</p><p></p><p></p><p></p><p>It can also be caused by the EGR valve sticking. Usually this will throw up a CEL, but that may only happen if it senses a problem with the EGR position sensor valve (Differential Pressure Sensor Controlled EGR valve)?</p><p></p><p></p><p></p><p>When the EGR system is working correctly, it is recycling a metered amount of exhaust gas back into the intake. This is an inert gas (already burned and contains no oxygen) so it helps reduce combustion temperatures to reduce air pollution. If the EGR is not operating for what ever reason, combustion temperatures can increase causing pre-ignition that we hear as pinging.</p><p></p><p></p><p></p><p>...Rich</p></blockquote><p></p>
[QUOTE="Richard L, post: 1026164, member: 52972"] Carbon may be building up in the engine that requires a SeaFoam application of the MAF may need cleaning. It can also be caused by the EGR valve sticking. Usually this will throw up a CEL, but that may only happen if it senses a problem with the EGR position sensor valve (Differential Pressure Sensor Controlled EGR valve)? When the EGR system is working correctly, it is recycling a metered amount of exhaust gas back into the intake. This is an inert gas (already burned and contains no oxygen) so it helps reduce combustion temperatures to reduce air pollution. If the EGR is not operating for what ever reason, combustion temperatures can increase causing pre-ignition that we hear as pinging. ...Rich [/QUOTE]
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SportTrac Discussion
Engine & Drivetrain
4.6L Pinging at low RPM
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