<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Apr 4, 2020, at 8:22 PM, Dave Maynard <<a href="mailto:dave@themaplehillfarm.com" class="">dave@themaplehillfarm.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">Have already switched injectors, replaced one, no change. Now replaced all the injectors yesterday with new and new cups on the bottom as well. Running a 20-50W synthetic and oil has been changed twice along with the filter. Same oil I've always run in my Chevy Duromax since it was new and have 300,000 miles on it and never done anything to it.</span><br class="Apple-interchange-newline"></div></blockquote></div><br class=""><div class="">Does cracking open the injector pipes one at a time when it’s running make any difference to the noise - its frequency, location or anything else?</div><div class=""><br class=""></div><div class="">Roger</div></body></html>