rsbilledwards Report post Posted November 26, 2018 Good one Joe thanks for posting it. B Share this post Link to post Share on other sites
jleamont Report post Posted November 26, 2018 F433921, you might want to read this post that Manholt mentioned above. Share this post Link to post Share on other sites
f433921 Report post Posted November 26, 2018 Here is my response from Cummins on the over run on startup. "It sounds like you did the normal process with the priming for the filter change. It may be just a fluke. However, if you really want to get to the root of it (with out fault codes), you would need to get it to a shop and have them run a diagnostic." https://locator.cummins.com Thank you for contacting Cummins. Steve Cummins Care Representative [SR#: 1-74210452344] If you have additional questions please feel free to respond to our support staff by e-mailing care@cummins.com or by calling 1-800-CUMMINS (1-800-286-6467) within the U.S. Additional calling options for outside the U.S. are provided on our website. When contacting us, please refer to the SR (1-74210452344) number listed above, if applicable. Visit us at www.cummins.com or www.cumminsengines.com Not real technical answer. Jim Share this post Link to post Share on other sites
wildebill308 Report post Posted November 27, 2018 just a thought, have you checked the drain on the bottom of the water separator filter? It could be open enough that fuel can't get out but air can get in. Bill Share this post Link to post Share on other sites
f433921 Report post Posted November 27, 2018 Bill, I removed the water separator filter today and found the sealing washer on the thread was a real loose fit, didn't find anything else that seem out of line, however I didn't check the tightness of the drain valve. I had a spare water separator filter so I decided to install it. The center sealing washer was a tight fit, I actually has to force it over the threads. I primed the system per instructions by cycling the on/off switch to activate the lift pump. The engine started within what seemed like a reasonable amount of cranking considering that the filter had just been changed. The engine idled smooth and I then activated the fast idle until air pressure was built. One thing that I did notice that lift pump didn't run for a very long period when cycling the on/off switch, I could hear 2 distinct clicks each cycle, no near 30 sec. that is described during a normal start up. I seem to only remember 2 clicks as been normal for my rig. I'm going to let it sit unit I get back home in a week and seen how it starts. Thank for the responses from all form members. What did you guys think about Cummins response on the over run on start up? It only happened 2 concessive and it has not repeated itself. Jim Share this post Link to post Share on other sites
manholt Report post Posted November 27, 2018 Diagnostic is not cheap! I think Steve knows what happened, but does not want to commit. If it happens again, then head to Cummings! You might want to have the pump looked at, when you get back! Did you fill up the coach with fuel & add a Biocide? Peace of mind, while sipping a Mai Tai on the beach! Share this post Link to post Share on other sites
kaypsmith Report post Posted November 27, 2018 Sounds as though the problem is solved to me. Good job in doing the right things. A couple of clicks instead of running the full 30 seconds to me indicates that there is probably no leak down anymore once the system has filled. Of course if only a couple clicks after sitting a week, then start up immediately will be a dream come true. Share this post Link to post Share on other sites
f433921 Report post Posted November 27, 2018 Got the biocide yesterday and will fill the tank today. My dad was a marine engineer and from my early ages he would take me too work with him and he always preached to me that if you are troubleshooting a problem the first question that you ask yourself is, WHAT DID YOU DO LAST?. he would tell me that more likely than not you will find out that it may be contributed to the last repairs or service that was performed. Thanks for all of the advice. Jim Share this post Link to post Share on other sites
five Report post Posted November 27, 2018 On 11/25/2018 at 10:09 PM, F433921 said: What caused the fuel separator to loose it's prime? Jim Have no idea. All three filters and the fuel/water separator were changed about three months and 2,000 miles before the problem. Share this post Link to post Share on other sites
wolfe10 Report post Posted November 27, 2018 The question often comes up in discussions of the "care and feeding" of diesel pushers:L HOW OFTEN SHOULD I CHANGE FUEL FILTERS. Fuel filters are one of the very few things for which there is NO average life. If all they see is clean diesel, they can go several years. But (actually LARGE BUT), one tank of contaminated diesel can take out a couple of sets of brand new filters. One reason I like the primary filters with a clear bowl-- it allows one to get a visual check on fuel condition at a glance. Share this post Link to post Share on other sites
