Transcription of Counterounter Point - Wells Vehicle Electronics
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Counterounter Point - Wells Vehicle Electronics
These programs use dynamometers to checkvehicle emissions under simulated drivingconditions. So knowing how to diagnose theEGR system when a NOX failure occurs shouldreduce the unnecessary replacement of EGR , a little background: the basic concept of EGR hasn t changed since it was introducedback in 1973 to meet federal emissionregulations. An EGR valve is used to open asmall passageway that connects the intake andexhaust manifolds. Intake vacuum then siphonssome exhaust back into the engine to dilute theair/fuel mixture. This lowers combustiontemperatures to reduce the formation of also helps the engine resist detonationunder load. (A typical earlier-style vacuumEGR valve is shown in Figure A.)
EGR valves. First, a little background: the basic concept ... information for voltage specs for Chrysler from idle to WOT that we can use for reference.
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