Just seeing if the techs knew if there was a TSB on the fuel pressure regulator valve...I took it to the dealer for this problem and they would just reflash it (for the second time). I mentioned the FPRV, but they said a little lopey is normal. I was wondering if there is something I could show them that states the problem and what to do to fix it. They also replaced 2 leaky injector lines. Should they have replaced all eight?? Just looking for some information to take back to them.


Thanks,
Justin

lopey idle is normal? Have them show you another one with the normal lopey idle. I would be interested in seeing that.


Injector lines only need to be replaced individually.

dmaxalliTech,


Is there a TSB on the regulator that I can take and show them???


Thanks,
Justin

Justin, unfortunalty, no


but there is published information on how to diag a lopey idle, talks of what I hit on above

if your lope is severe the regulator may cause this but a minor surge is caused by the regulator design

juicemac78,


The only TSB that I am aware of refers to replacement of the fpr but does not state that it will fix the cold idle surge cond. I\we diesel techs just know that it does from experience & info sent to us through technical assistance, if the reflash doesn't clear it up. It fixed mine 100%. It was primarily the 2001 models that were affected. Hope this helps:
<H1>Info - 6.6L LB7 Duramax Diesel Fuel Pressure Regulator Replacement #03-06-04-010 - (Jan 17, 2003)</H1>


6.6L LB7 Duramax™ Diesel Fuel Pressure Regulator Replacement


2001-2003 Chevrolet Silverado 2500/3500 Series Models


2003 Chevrolet Kodiak C4500/C5500 Series Models


2001-2003 GMC Sierra 2500/3500 Series Models


2003 GMC Topkick C4500/C5500 Series Models


with 6.6L Duramax™ Diesel Engine (VIN 1 -- RPO LB7)


The fuel pressure regulator, P/N 97728979, is now serviceable separate from the fuel injection pump.



http://service.gm.com/engif/000/000/952/952814.gif
http://service.gm.com/tif.gif (http://service.gm.com/servlets/RetrieveTif?pic=952814)



If the Service Manual diagnostics lead to the replacement of the fuel pressure regulator, inspect the inner tip of the regulator (see illustration) for corrosion upon its removal. The inner tip of a fuel pressure regulator from an uncontaminated fuel system will be smooth with tan colored fuel deposits, but it will not be blackened with heavy scaling or pitting.


If blackened corrosion and pitting is found on the inner tip of the regulator, the integrity of the fuel injection pump has been compromised and the pump must be replaced. Replace the fuel filter element and clean the fuel system using Service Manual procedures. Injector replacement is not necessary, as the fuel injection pump is the most susceptible component to corrosion damage. After repairs are completed, re-evaluate the vehicle's performance to ensure no additional concerns are present. Some fuel additives emulsify water into the fuel and allow the water to get past the fuel filter/water separator. Fuel additives can be introduced by the customer or by the fuel retailer. Advise the customer of possible fuel source issues and recommend against the use of aftermarket fuel additives.<A name=ss1-1227270><A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=1227270&amp;pubid=210&amp;evc=sm#ss1-1227270" target="_blank">
<H5>Parts Information</A></H5>



<TABLE width="100%" border=1>
<T>
<TR>
<TH vAlign=bottom align=middle>


Part Number</TH>
<TH vAlign=bottom align=middle>


Description</TH></TR>
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<TD vAlign=center align=middle>


97728979</TD>
<TD vAlign=center align=middle>


Fuel Pressure Regulator</TD></TR></T></TABLE>


P.S. This is the Canadian version of this bulletin. I am Canadian.


Todd.