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ohio farmer
Member

cummins motor

 I have a white 195 with a 8.3 cummins motor in it. When it gets above 1800 rpms it runs eratic. It seems to make a huffing noise. Almost like a miss in a gas motor. any suggestions would be helpful. Thank you.

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3 Replies
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RHiebert
Veteran Reader

Re: cummins motor

Assuming this is a diesel and that the fuel lines, filters are clean and clear. Sometimes using fuel additive, ie. Diesel fuel additve and even trying synthetic may be a cheap start. 

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Advisor

Re: cummins motor

Assuming there isn't anything else internally wrong, like a burned valve ...I'd be willing to be you either have a pump or injector problem. Either the injector pump isn't getting enough fuel from the transfer pump...or maybe a spring in one of your injectors has gotten weak..causing it to miss, or stay open and not pop off. This doesn't sound like work for someone without experience...unless you have the time to play with it all winter.

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Advisor

Re: cummins motor

It does sound like fuel starvation.  The huffing sound could be compressed air from the cylinder coming out with no fuel explosiveness behind it.

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