Common questions

What if diesel filter is not changed?

What if diesel filter is not changed?

Without the filter, your fuel could end up tainted by all kinds of crud, including dirt and paint chips. Not only does the filter help to shield your fuel pump and injectors, it also plays a significant role in ensuring that you are achieving the highest fuel-efficiency possible.

How do you change the fuel filter on a Cummins?

After changing the filter you will have to purge the air from the system. Maybe not, our ISC self purges with no trouble. Just turn on the ignition switch, that turns on the electric pump and fills the filter. You might have to repeat it. Oh yes, DON’T leave the petcock open on the bottom of the filter. It can spill a LOT of fuel in a short time.

How often should you change the fuel filter?

NO, DON’T ASK ME HOW I KNOW!! OP: you’re supposed to change the fuel filter every time you change engine oil, on our ISC that’s every 15,000 miles or once a year. DON’T prefill the filter if you have an ISC, if you do prefill it do so ONLY through the small holes on the outside of the filter.

How do you purge fuel in a Cummins?

To purge your Cummins you turn the key to Run, but do not start the engine. The fuel pump will run about 30 seconds. Turn the key off and back to Run again. Do this four or five times and let it purge 30 seconds before turning it to Off and it will purge air out of the fuel system. Then you can start your engine. Norm

After changing the filter you will have to purge the air from the system. Maybe not, our ISC self purges with no trouble. Just turn on the ignition switch, that turns on the electric pump and fills the filter. You might have to repeat it. Oh yes, DON’T leave the petcock open on the bottom of the filter. It can spill a LOT of fuel in a short time.

NO, DON’T ASK ME HOW I KNOW!! OP: you’re supposed to change the fuel filter every time you change engine oil, on our ISC that’s every 15,000 miles or once a year. DON’T prefill the filter if you have an ISC, if you do prefill it do so ONLY through the small holes on the outside of the filter.

To purge your Cummins you turn the key to Run, but do not start the engine. The fuel pump will run about 30 seconds. Turn the key off and back to Run again. Do this four or five times and let it purge 30 seconds before turning it to Off and it will purge air out of the fuel system. Then you can start your engine. Norm

Author Image
Ruth Doyle