Carmar122 Report post Posted November 25, 2016 I'll try Chris McCord at Spartan tomorrow. I really find it hard to understand the thought process of not filtering before lift pump. I use to do a lot of drag racing first thing everybody did was put a fram fuel filter right out of tank. It protected fuel pumps needle and seats well everything from contamination. In my opinion if we're going to run one filter give it to me before lift pump. Share this post Link to post Share on other sites
gglenn Report post Posted December 5, 2016 On 11/23/2016 at 5:35 PM, Carmar122 said: Hi all, here's the update as promised. I got coach back from cummins today. Engine surging and bucking under load turned out to be a clogged lift pump. Couldn't believe my eyes algae in pump was black and looked like tar. They also found rocker box was leaking oil. Replaced pump and resealed rocker box and new valve cover gasket. Came to about $2100 but luckily saved 10% with my cummins power club card. Definitely worth the $19.95. So if your ever in need of cummins service in New Hampshire cummins in concord n.h, on integra dr did a good job. They are very close to loudin n.h. We're NASCAR holds two races a year. Curious if they broke out the cost of replacing the lift pump and rocker box gasket. Just curious what the lift pump replacement cost was... Share this post Link to post Share on other sites
Carmar122 Report post Posted December 5, 2016 Hi glen, lift pump was $448.12 and unfortunately labor was not itemized. Labor for diagnostics, repair and road test plus shop supplies was $ 1404.00. These prices are after my Cummins Power Club 10% discount. Hope this helps. Try to keep tank full when storing and now I throw at least two oz of biocide every time I fuel up. Carl and Margaret 2004 American tradition 40 w 2013 Honda CR-V New Hampshire Share this post Link to post Share on other sites
jleamont Report post Posted December 6, 2016 Carl, the Biocide will kill whatever is alive in the tank, you might want a fuel treatment product to keep it from reoccurring, boost your cetane level, lubricate the system and absorb/breakdown the water. I had a similar problem in June of this year. Once I added the biocide and killed the bugs I started adding fuel treatment to help with the poor quality fuel that is around. It made a noticeable difference in the performance of the coach. Bugs are only part of the problem, they feed and grow on the bio product and water suspended in the fuel, take those out of the equation you should be good. I would seek advice from Spartan on an inline filter before the pump also. Share this post Link to post Share on other sites
Carmar122 Report post Posted December 6, 2016 Jleamont, would you recommend any fuel treatments. Thanks carl Share this post Link to post Share on other sites
jleamont Report post Posted December 7, 2016 Carl, I run Diesel mate, which is hard to find and purchase without buying a case all in one shot. A case will run around $300.00 which lasts me a year or so. Power Service Diesel fuel supplement is another one I have heard good reports on and you can purchase that at almost any auto part store. Share this post Link to post Share on other sites
Carmar122 Report post Posted December 7, 2016 Contacted Spartan they referred me to cummins on filtration. Cummins opinion is adding a 10 micron filter would be no problem. However there thought was fuel is constantly returning to tank so it eventually filters all fuel. Ultimately dumping fuel and cleaning tank would be the best answer. I am not going that route though. Biocide and power source diesel kleen and fingers crossed. Oh and always stored with a full tank of fuel. Thanks again Carl. 2004 American tradition 40 w 2013 Honda CR-V Share this post Link to post Share on other sites
wildebill308 Report post Posted December 7, 2016 Carl, I like the filter before the pump to catch any thing that you might pick up at/ with bad fuel. Ultimately all the fuel will go through the filter cleaning it so I think you are good to go. Bill Share this post Link to post Share on other sites
five Report post Posted December 13, 2016 If you are going to store the RV with diesel in it, the tank should be full and you need a biocide, like Biobor: https://www.zoro.com/biobor-diesel-fuel-biocide-8-oz-bb08ez01us-2/i/G5770725/?utm_term=D_PB20_Auto&utm_source=bing&utm_medium=cpc&utm_campaign=PLA_US_2&utm_content=Auto%20%26%20Truck%20Maintenance&gclid=CPi_84Sq8tACFakhfgodm2gAyQ&gclsrc=ds Other additives increase cetane rating, provide lubrication, etc, like Power Service Diesel Kleen: http://www.ruralking.com/diesel-kleen-plus-cetane-80oz.html?utm_medium=cpc&utm_source=bing&utm_campaign=(roi)+shopping+-+automotive&utm_content=automotive Share this post Link to post Share on other sites
