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Discussion Starter · #1 ·
I'm trying to learn if my 2001 Dodge 3500 w/ Cummins turbo diesel (80,000 mi) needs a tuneup or not. My owner's manual doesn't mention anything about spark plugs or tuneups - just cleaning/replacing the air filter, oil & oil filter, and fuel filter.

I've noticed a reduction in mpg in the last 6 months and don't know if the local garage is fit for working on a Cummins diesel pickup.

Do I need to locate a diesel specialist to "tune" my pickup?

What should a tune-up include? And what should it cost?

Thanks for any help.

Chris
 

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Hey friend, first welcome the to the site!

There are no spark plugs in a diesel. Try changing the fuel filter and make sure you air cleaner is clean.

Second, there are a few performance products on the market that will help you achieve better mpg (module/chip, air intake and exhaust).
 

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k first off your cummins does not have spark plugs... pretty much to increase your mileage is to change out your ail filter and change your fuel filter freqently... your valves need to be adjusted at 100,000 some people say 150,000 but your owners manual says 100,000.....
 

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I'm trying to learn if my 2001 Dodge 3500 w/ Cummins turbo diesel (80,000 mi) needs a tuneup or not. My owner's manual doesn't mention anything about spark plugs or tuneups - just cleaning/replacing the air filter, oil & oil filter, and fuel filter.

I've noticed a reduction in mpg in the last 6 months and don't know if the local garage is fit for working on a Cummins diesel pickup.

Do I need to locate a diesel specialist to "tune" my pickup?

What should a tune-up include? And what should it cost?

Thanks for any help.

Chris

Chris, :welcome:

First off, I don't know how much you know, so i'll give you the benefit of a doubt and assume that the spark plug comment was a joke, but just in case it wasn't. You Cummins does not have spark plugs, the pistons compress diesel and air so much that the mixture ignites itself, so no spark plugs or glow plugs to worry about. That being said, the only things I would think you need to look at are the air filter and fuel filter.

Good luck man, how long have you had it?

-Joe-
 

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Discussion Starter · #5 ·
Unfortunately, it wasn't a joke. I've had the truck since new.

So, after I replace my air filter and fuel filter, I've completed my tuneup? Nothing else to be set/adjusted for maximum efficiency?

Thanks for the reply.
 

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01, 80,000 miles, may need to look into the lift pump pressure and make sure it is still strong. Mainly the fuel and air filter, but your truck also has a test port for the fuel pressure (someone will chime in with a pic) and there are a couple of other items (IAT sensor cleaning, MAP sensor cleaning) that can be done to make sure it is running at its best. Fill out your location and signature and someone may be local to help you out.
 

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Unfortunately, it wasn't a joke. I've had the truck since new.

So, after I replace my air filter and fuel filter, I've completed my tuneup? Nothing else to be set/adjusted for maximum efficiency?

Thanks for the reply.
have you ever replaced the fuel filter in 80000 miles?
 
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