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Old 07-20-2016, 12:57 AM   #1
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96 holiday rambler endeavor starting issues

5.9 cummins diesel 130k miles
after sitting for a few weeks it starts right up then dies after about 10-15 seconds then takes priming before it starts again, i have to push the primer on the lift pump 200+ times then it starts no problem . After it sits a few weeks or longer i have to repeat the process. Should i look at replacing the lift pump or is it possibly the injector pump? any help would be greatly appreciated
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Old 07-20-2016, 09:15 AM   #2
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Originally Posted by drive805 View Post
5.9 cummins diesel 130k miles
after sitting for a few weeks it starts right up then dies after about 10-15 seconds then takes priming before it starts again, i have to push the primer on the lift pump 200+ times then it starts no problem . After it sits a few weeks or longer i have to repeat the process. Should i look at replacing the lift pump or is it possibly the injector pump? any help would be greatly appreciated
drive805
It sounds like air is somehow getting into your fuel supply system.
Mel
'96 Safari, 148k miles
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Old 08-03-2016, 12:23 PM   #3
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drive805
It sounds like air is somehow getting into your fuel supply system.
Mel
'96 Safari, 148k miles
I second that. Look to see if there is any tell tale signs of fuel drops or damp lines or fittings. Basically what you are doing is the standard procedure to reprime the fuel system. Make sure all fittings are tight including the injectors. Good luck. Keep us posted .
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Old 09-11-2016, 11:39 PM   #4
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starting issues

sorry it took so long to reply back ... i checked all the hoses and fittings and seeing no leaks i decided to change the lift pump,( the fuel line is old and cracking and will replace soon... just its about 15feet of rubber line YIKES) since changing it seems to start easier ... after a long 2400 mile vacation trip had a slow start issue in the cold of Yellowstone 35deg one morning the rest of the trip was great, now if i could just figure out this idle issue ?????
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Old 09-12-2016, 12:43 AM   #5
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sorry it took so long to reply back ... i checked all the hoses and fittings and seeing no leaks i decided to change the lift pump,( the fuel line is old and cracking and will replace soon... just its about 15feet of rubber line YIKES) since changing it seems to start easier ... after a long 2400 mile vacation trip had a slow start issue in the cold of Yellowstone 35deg one morning the rest of the trip was great, now if i could just figure out this idle issue ?????
Well, if it was me, I would replace any rubber line that is cracking, as soon as possible! The new lift pump may purge the air out of the system faster than the old one, but your hard start problem will show back up, as more air is sucked into the system, when you shut the motor off! It will not show a fuel leak, in the cracking, because it is a suction line, not a pressure line! But when your motor is off, it will let air into the system, which will let the fuel drain back into the fuel tank, and out of your filters. When you go to start, you will be working the lift pump harder than normal, to fill the lines and the filter back up, before it will start! To test this, after your MH has been sitting, pull your fuel filter off, and see if it is full, or half empty? A sealed system, will start right up, as everything is primed and full!
Your hard start when it was cold is normal, as diesels are a lot more cold natured than a gas motor! I do not know if your motor has grid heaters in the intake, or glow plugs? But to test it, next time it is cold out, turn the key on, watch the voltage gage, does it drop, when the key is turned on, before you turn all the way to start? If it does not change, when you turn the key to on, your grid heaters are not working! But if it does drop, watch it, and you should hear a click, and it will come back up to normal, then start. If it does not start right up, repeat! Hope this explains this in easy to understand terms! Good luck! Happy travels! Rail!
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