power loss

[dirttracker0]

Have a 2000 fleetwood 300 horse cummings.It losses power mostley under loads when the check engine light comes on when light goes off it runs ok.If i come to a stop and try to take off im done for light goes on and off when it reaches about 1800 rpms it will do better but still dont have any power with light on.Changed fuel filter it was dirty that didnt help.going up hills it will do fair with light going on and off if i keep rpms up by manually downshifting trans into low gear.also guages everyonce in awhile will jump around my tach and speedometer mostly.Any sugestions?

[ua40j]

I would check also the air filter. See if it's clogged or damaged.

Does the turbo spin up? Can you hear it?

A trip to a Cummins shop might be needed to find out what the fault codes are. You may also have lift pump or injection pump issues, fuel starvation, etc.

[Barney Bar]

I had the same problem and it turned out to be a turbo. Not cheap to replace . warranty cover about 2/3 of it.

[spike45]

Quote:

Originally Posted by dirttracker0 Have a 2000 fleetwood 300 horse cummings.It losses power mostley under loads when the check engine light comes on when light goes off it runs ok.If i come to a stop and try to take off im done for light goes on and off when it reaches about 1800 rpms it will do better but still dont have any power with light on.Changed fuel filter it was dirty that didnt help.going up hills it will do fair with light going on and off if i keep rpms up by manually downshifting trans into low gear.also guages everyonce in awhile will jump around my tach and speedometer mostly.Any sugestions?

See the other thread on this topic:

low boost pressure on a 03 isl

[srydve]

My freightliner xc chasiss has a fuel strainer in it before the filter, My symptoms were not nearly as severe as yours but I was getting check engine under heavy load. After replacing fuel filter and pump it turned out to be a plugged strainer, $15.00. It's a little tough to find but if you have one I would definately change it first.

[dirttracker0]

Thanks everyone had it checked out the code came up injector pump the mechanic said it was getting to much fuel it would blow white smoke after it was started up idiling.He said he can get it rebuilt monday was just wondering would it be better to get it rebuilt or get a new on he has not giving me a price yet until he gets ahold of the shop that rebuilds them.Hope that fixes it he has not charged me nothing yet he already drove an hour and spent time looking at it so he seems preaty trustworthy.

[dirttracker0]

Mechanic did more checking found another fuel filter i didnt replace or know about below the other filter on the pasenger side of the block it was rusted and coroded looked like it has never been replaced.Will let u know if that was it when i take it on another trip soon hope this helps others out.

[dirttracker0]

Wound up being injector pump also head gasket water pump problems and idler pully guess i bought a lemon getting it fixed and going to sell and get a gas unit diesels are to costly on maintenence could buy new gas motor for price injector pump and labor alone will cost.

[Skip426]

Fuel starvation, was the probable cause of injector pump failure, as the injector pump uses 70% of the fuel it gets from the tank to cool and lubericate its self, then returns it to the tank. So by the time you use a tank of fuel in a diesel engine it's all been through the filter about 5 times. Thats why they plug up so fast. Running lean and probably hot from lack of fuel, more than likely took out the head gasket. Unfortunately for you; learning this the hard way; knowing the location and having the filters both changed regularly, may have prevented both problems.

[dirttracker0]

Found a place in mempis tn found them on ebay called dieselcare that rebuilds injector pumps alot cheaper than new which was $2300 they will rebuild mine for $1045 plus $28 shiping.Hope this helps someone else out this site has give me so much info now my turn.

[ninos]

[QUOTE=srydve;870052]My freightliner xc chasiss has a fuel strainer in it before the filter, My symptoms were not nearly as severe as yours but I was getting check engine under heavy load. After replacing fuel filter and pump it turned out to be a plugged strainer, $15.00. It's a little tough to find but if you have one I would definately change
Not sure what are you talking about but I probably have one to, can you tell me where exactly is it and what year chassi do you have. Thanks joe

[srydve]

I have a 2004 freightliner xc chassis. The fuel strainer is in the loom on top of the frame passenger side behind the rear wheels. It's hard to get to, I was able to squeeze in after fully extending the rear jacks but I'm not a real big guy. You'll likely have to cut a couple of zaps to find it amongst all the other wiring and lines. Once you're there and have found it, it's pretty easy to change, have some kind of a pail to catch the diesel that will drain out.

[Dirtbuster]

[QUOTE=srydve;906552]I have a 2004 freightliner xc chassis. The fuel strainer is in the loom on top of the frame passenger side behind the rear wheels. It's hard to get to, I was able to squeeze in after fully extending the rear jacks but I'm not a real big guy. You'll likely have to cut a couple of zaps to find it amongst all the other wiring and lines. Once you're there and have found it, it's pretty easy to change, have some kind of a pail to catch the diesel that will drain out.[/QUOTE
]

What engine do you have? I am having the very same problem, with an ISC 350. Freightliner says I only have one filter. I agree that all of the wiring & hoses are hard to look around. Please give me a reply, as mine is now sitting in the shop!

Thanks!

[srydve]

I have a 5.9 300hp ISB