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Old 06-18-2019, 09:24 PM   #1
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Help with 2015 Fleetwood 40g engine issues

Hi guys,

I have a 2015 fleetwood 40g eight the Cummins ISL. Coach has 15k miles on it and has worked flawlessly to date. I was driving home from Austin to Houston on Sunday and at one point it felt low on power but that may just be in my head. In any case I stopped for fuel at bucees and put in around 40 gallons before I felt the lower lower but again could be in my head.

Got it home and then went to move it and the orange check engine light come on when I started it but went away soon as I put it in gear. I moved the coach shut it down and shut batteries off and started it back up, again the Orange check engine light came on but went away within 30 seconds. I also noticed it smelt kinda like raw diesel outside but again could be in my head.

Any advice or input on how to check codes ? I have read that I should replace fuel filters from other experience with similar issues, does anyone have the numbers for the filters ? Also I noticed the air filter is pretty dirty, any info on part number for replacement ?

Any other advices is greatly appreciated.
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Old 06-19-2019, 03:29 AM   #2
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check anti freeze level. ff5488 and fs1022 are filters for fuel. 2 of e'm. but check radiator fluid level, theres a sensor there
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Old 06-19-2019, 11:04 AM   #3
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I agree with the above poster, might be time to change the two fuel filters. I would certainly crawl under and drain & catch some fuel from the water separator filter. Do you have water in the fuel? Do you have alga growing in the fuel? I have a 2018 ISL and my filter part numbers are Fleetguard FF63009 and Detroit DDE R61709. You may have different filters. I always carry spare fuel filters, you never know when your going to bet a bad tank of diesel.
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Old 06-19-2019, 04:04 PM   #4
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Thanks fellas.

Will check coolant tonight and order a few of the fuel filters. Any idea on where I can find the air filter part number ?

Much appreciated.
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Old 06-19-2019, 06:34 PM   #5
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My air filter is Ecolite Racor 062891001.
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Old 06-20-2019, 10:57 AM   #6
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remember coolant is not your car or truck stuff. need sca additive to Cummins spec.here is my filter list for isl

Cummins Replacement Filters
Cummins ISL
400 Diesel Engine

This information is taken from the Freightliner “Knowing your Chassis”, March 2004 Edition.
Replacement Filters

Oil Filter
Fleetguard LF9009
Fleetguard LF3000 (for Reduced Svc Intervals)

Fuel Filter
Fleetguard FS1022

Water Filter
Fleetguard WF2071
Fleetguard WF2121 (for ES Coolant)

Air Filter
Farr 062891-001
Napa 6891

Transmission
Allison 29540493

Air Dryer
Midland DQ6026
Haldex Pure Air Plus DQ6026
Haldex PURest DQ6050 (Filter Kit)
Haldex PURest DA33115 (Purge Valve Kit)
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Old 06-26-2019, 10:42 AM   #7
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If you smell raw diesel it's doing a regeneration on the Diesel Particulate Filter.
That's OK. Do not do any idling more that necessary. Replace fuel filters. Clean air filter inside.
Then run it only at highway speeds.
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Old 06-26-2019, 01:45 PM   #8
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Next time you feel it's low on power, let completely off the throttle for a few seconds, then floor it. If it's water in fuel or dirty fuel filters, fuel flow will return (at least briefly) and your boost will return to full along with full power.
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Old 06-26-2019, 01:55 PM   #9
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I had exact same experience you had, not going to tell you what the result was, but it was expensive.

Check all the simple stuff already suggested, if that does not solve it, feel free to message me. When I was at Cummins getting my issue looked at, before the tech even hooked up his In-Site at the back plug, he had me run it for bit, shook his head and said yup, definitely smell fuel in your exhaust, that almost always means X.

Lets hope its something simple
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