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<p>[QUOTE=&quot;KB3MMX, post: 5467995, member: 156604&quot;]Something else to consider is, fuel filter quality on the Volvo is sub standard for the injection pressures used.</p><p><br /></p><p>&nbsp;The stock filter is only 5um and not absolute rating. None of the aftermarket filters are any better either.</p><p><br /></p><p>&nbsp;One thing I have done is started using the 7um davco filter to catch a little more particulates before they get to the crap engine mounted filter.</p><p><br /></p><p>&nbsp;Anyways.....the pressure of these injectors requires considerable force applied to the injectors. This force pushes the injector up/down within the cup as a flexing. Eventually the deal at the injector tip or the seal to the head fails from the flexing.</p><p><br /></p><p>&nbsp;The steel cups flex far less than brass....but don&#039;t totally fix the problem.</p><p><br /></p><p>.[/QUOTE]</p><p><br /></p>

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