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deb_siems's avatar
deb_siems
Explorer
Sep 09, 2015

2003 Newmar Dutchstar cummins 350 isc loses power

We have a 2003 Dutchstar cummins 350 isc that has always performed beautifully. On our recent trip from WA state to Virginia everything was fine going over the Rockies until we hit the plains in Nebra...
Vulcan_Rider's avatar
Vulcan_Rider
Explorer
Sep 09, 2015
Fuel and air IN, compression, exhaust out.

A diesel really is that simple.

A clogged air filter OR exhaust can cause symptoms similar to insufficient fuel. After those things have been addressed, the compression needs to be checked.

Long shot: Thermostat stuck open and engine not getting hot enough.

At this point, a professional analysis might be cheaper in the long run.

The simple fact that this showed up right after filling up is STRONG evidence that bad fuel might still be the cause.

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