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<p>[QUOTE=&quot;pawpaw1, post: 3058636, member: 71457&quot;]There are 2 metering and 2 timing actuators on the left side of your engine , that control fuel pressure to your injectors . The injectors are pure mechanical. If you are getting a low fuel pressure code , and have changed the fuel filters , I&#039;m guessing its probably a problem with the actuators . </p><p>If you have the INSITE program on a notebook computer , and the USB adapter cable , you could probably figure this problem out , by looking at what your engine is doing , going down the road. </p><p>&nbsp;Otherwise , I guess the best advice I can give you , is to find a good Cummins mechanic , at an independent shop , to work with you , on this problem.</p><p>&nbsp;As to boost pressure , I just replaced my turbo , on my ISX , and the boost pressure is still about 26-27 lbs. </p><p>&nbsp;have you checked or replaced your air filter ? I didn&#039;t think mine needed replacing , cause the restriction gauge said no restriction . It was wrong. I replaced both filters . The one on the right side was stopped up bad![/QUOTE]</p><p><br /></p>

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