TDI 4.2 GU ERG unit guming up
Submitted: Thursday, Sep 16, 2004 at 22:57
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crayman
Thank`s Chris for your very informative post on 4.2tdi .I have a 2003 GQ 4.2tdi ST which has now done 40k i still have my old 4.2 d which i aftermarket turboed at 40k now 225k and find side by side old gq goes harder than the GU ,I note your comments re EGR guming up,
can i clean out and disconect EGR unit,any clues as to how you do this
Maurie
Reply By: Member - Chris M (QLD) - Friday, Sep 17, 2004 at 09:00
Friday, Sep 17, 2004 at 09:00
Maintenance Tips/Suggestions: EGR systems usually do not require regular maintenance. Signs of a malfunctioning EGR valve or its related components include engine spark knock under acceleration, rough idle, stalling, and reduced power. To determine if your car has an EGR system, refer to the Vehicle Emission Control Information (VECI) label underneath the hood, which will call out this emissions subsystem if so equipped. If you suspect a problem with your vehicle’s EGR system, have it checked out by a professional technician. A malfunctioning system, if neglected long enough, can cause engine damage.
Q: What is the EGR valve?
A: The EGR valve is part of the emissions system. EGR stands for exhaust gas recirculation (some people call it exhaust gas recovery). The object of this valve is to allow controlled amounts of exhaust gas to enter the intake manifold. This dilutes the intake mixture and lowers combustion temperatures. The lower temps reduces the NOx (nitrogen oxides) emissions. It also knocks the hell out of your power as
well.
Gday Crayman,
Just two different articles I found on the net. Don't know whether it's a job for the home handyman or not, but I'd be tempted to go to a diesel specialist every 10-20 thou or so and have it checked.
Cheers,
Chris.
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