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Old 11-24-2020, 06:40 PM   #1
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Has anyone removed the EGR Valve on a ISM 500 HP Cummins. If so how long to remove. Also who makes the kit. Ugly valve says you have to have a working EGR for there kit to work.
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Old 11-29-2020, 08:37 AM   #2
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I did not remove but did try the ugly valve. It did not work for me. Ended up throwing a code after being in for a while so I just removed it. Always wished it could just be blocked like in the Duramax by just inserting a restricter plate. Good luck in your search. Safe travels

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Part timers 2020 Entegra Esteem 29V class c. Tow 2017 Jeep Rubicon. Full timed in 2008 Newmar Essex
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Old 11-29-2020, 08:58 AM   #3
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Fix it right, your grandchildren want to breath clean air too.
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2015 Fleetwood Discovery 40E on a Freightliner XCS chassis with a Cummins ISL9 pulling 1 and/or 2 motorcycles, '07 Honda Accord OR a 17' Runabout Boat.
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Old 12-01-2020, 08:22 PM   #4
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I replaced mine on our 2006 Newmar Essex a couple of years ago. Easy job! The EGR is very accessible; Look above and to the right of the alternator. EGR valve was pretty cheap as I recall.

BTW: The Ugly Fix (not ugly valve) was a pain in the a$$ to install on my ISM. It was taped up, painted Cummins red and buried way up in the wiring harness on the intake side of my engine. It replaces a barometric sensor and tricks your engine into thinking it is at high altitude and prevents the EGR valve from opening and allowing exhaust gas to flow. I tried it and also threw an engine fault code, so I removed it and put the original sensor back in.
Ron & Laureen Ramsey
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2019 Newmar Mountain Aire 4551
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