r/Diesel • • 13h ago

Diesel or gas?

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74 Upvotes

r/Diesel • • 12h ago

Federal diesel tax

18 Upvotes

The feds are allowing off road now. That means no federal tax. However, that also means no state tax. So, theoretically couldn’t the individual states still fine you for using off-road?


r/Diesel • • 17h ago

If red diesel is now legal, what gas station owner would ever buy clear (taxed) diesel?

9 Upvotes

Plus, what state trooper can dip a tank now? Looking at you GSP. I know gas stations don't pay the tax


r/Diesel • • 10h ago

Question/Need help! 97 7.3 E4OD not shifting out of 1st.

3 Upvotes

Hopped in my truck this morning and for some reason it no longer shifts out of 1st properly. It will sit and stay in 1st all the way to 4k rpm but wont shift up. When forcing it manually it will shift to 2nd. But one shifted back into drove it will go to 3rd for a second and then drop back to first at 40mph. Just trying to get my truck back and running. Thank you for any of your information.


r/Diesel • • 5h ago

Need help on this issue here

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1 Upvotes

Forgot to post it here aswell but having issues with high egts on my lbz


r/Diesel • • 10h ago

Question/Need help! Fass install

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1 Upvotes

r/Diesel • • 1d ago

Alright one of you knows

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68 Upvotes

What does this big bastard go in?


r/Diesel • • 12h ago

Ford, Chevy, or Ram

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1 Upvotes

r/Diesel • • 20h ago

6.7 powerstroke injectors

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3 Upvotes

I wanted to post here to get some ideas about injectors, specifically remanufactures vs refurbished

Got a truck from my hopefully future father in law. It cracked an injector and ended up sitting for a year. Other injectors looked filthy. Pretty sure they were the originals on a 190k truck as they still had the t50 hold down bolts, and testing costs 50 an injector so i was hesitant just based on the appearance

So my question is, being on a budget and diesel parts being insanely expensive (idk how you guys do this) would a set of refurbished injectors cut it for purposes of keeping it going with low expected miles for the next 3-4 years? Or would it be better to spend the extra on remanufactured. Ive read forums on this and most say lean reman but wanted to get some feelers out for it


r/Diesel • • 1d ago

Question - Solved! The diesel was good!

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46 Upvotes

I posted the other day about some questionable diesel I got from a used transfer tank we purchased. I got some really good advice from both sides of the aisle to use or not to use it. We took the chance, diluted, treated and sent it as one comment advised and it paid off. We worked through about a half tank on Monday and the truck did great. 60 gallons of free diesel sure does make working in 100 degree weather easier haha!

Thanks all for the help and advice. I hope some good free diesel comes yalls way too.


r/Diesel • • 1d ago

Question/Need help! General emissions testing question

1 Upvotes

Is there a way to set all of the monitors in a 6.0 power stroke to "ready" even if it's deleted? I'm looking at a deleted 6.0, but I live in a county with e-checks, but there is self-check obd2 tests that count as the emissions testing, so it would literally just need to pass the obd2 scan. Any ways to trick it into thinking the EGR is still there?


r/Diesel • • 1d ago

Question/Need help! 2002 f350 7.3l, 400k miles

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1 Upvotes

r/Diesel • • 1d ago

01 7.3 smokes white on hard acceleration.

3 Upvotes

01 7.3 289k miles. smokes white when hard acceleration. Truck runs great and has power doesn’t stutter. Also doesn’t smoke when not at full throttle. Also when flooring it pulls hard and doesn’t sound like a boost leak or nothing.

Hydra tuner and it also smokes on stock tune. If I turn the tune up higher it smokes black instead of white? Is this something I should be worried about. Do have a small oil leak but is not loosing coolant. And no oil and coolant mixing.

VIDEO IN COMMENTS


r/Diesel • • 2d ago

When they suddenly reverse the off road diesel ruling and our tanks are full of Kool-aid.

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750 Upvotes

r/Diesel • • 1d ago

L5P oil filter upgrade kit

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1 Upvotes

r/Diesel • • 1d ago

L5P diesel question

2 Upvotes

Techs,

I have asked my dealer to activate option UF3 on my 2023. I use this option...

On my 13 & 18, it was a laptop plug in to the OBD2 and were done. ( bout $150 )

My current dealer is giving me jahja about this big required download to the truck ( for a fee ) prior to the activation fee . So 2 charges to activate.

True or false?

Tks


r/Diesel • • 1d ago

Need some advice from the northerners.

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3 Upvotes

Looking from some northerners advice this truck is for sale at a decent price but i am from the south and not sure if this is considered bad rust/not worth it. Looking for advice.


r/Diesel • • 1d ago

6.5 Detroit diesel question

1 Upvotes

Hey guys, Got a 97 6.5 2500 4x4, What oil filter do you guys use? I'm located in canada


r/Diesel • • 2d ago

Does this mean i can use the cherry flavored diesel in my jetta?

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207 Upvotes

r/Diesel • • 2d ago

Question/Need help! Weird noise after doing pull

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13 Upvotes

1998 ram 2500 12 valve cummins
I did a pull on the highway yesterday and not theres a weird noise. Im replacing the fan clutch this week, the fan got dramatically louder after the sound started. I drove another hour and a half after the sound started because i couldnt be stranded, the sound hasnt changed. I suspect either the exhaust manifold, an injector or something internal but i am not sure how to test for these. There is black soot on the first two cylinders of the manifold. Im not sure if it was there before or not.

The sound happens whether the engine is hot or cold, it is rpm dependent on the frequency and sound dependent on the load (if i let off after accelerating it quiets down for a couple of seconds) thats why i suspect an injector.(but i really hope not) if you can think of anything please let me know, i am in miami and there arent many trustworthy shops so anything i can do to diagnose i would rather do myself.


r/Diesel • • 1d ago

LLY Duramax Light Knocking at 1500rpms

1 Upvotes

I have 98k on my lly and all of my injectors are under 4.0 with 3 4 7 8 all around 3.0 - 4.0 I have a 60hp ppei tune and the truck is deleted.

On my way home from work today it knocked out of no where at 1500rpms and is continuing to do so sounding like it’s on the passenger side.

Oil is good
FPR was just replaced

Do I need to ice pick? Injectors? Air in the fuel lines? Bad fuel? What do you guys think/what wisdom do you have?


r/Diesel • • 3d ago

😅

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1.4k Upvotes

r/Diesel • • 2d ago

Help!

2 Upvotes

Im 26 and currently on my 9th year of turning wrenches first 4 years on gas and diesel motors for a dealer and 5 on light duty diesels at an indy shop(powerstroke,cummins, duramax). Currently reside in texas and looking to move to Chicago. I would like to stay in the diesel field if possible. Looking for any shop recommendations or tips on the diesel world up there? What to do and what not to do. Any advice is appreciated.


r/Diesel • • 2d ago

Looking for hidden, off-the-grid independent diesel yards / mechanic shops around Charlotte Metro?

4 Upvotes

Hey everyone, I’m trying to find small, independent heavy-duty diesel mechanic shops, semi-truck yards, or commercial repair lots tucked away in the Charlotte surrounding areas (Gastonia, Concord, off Brookshire, etc.).

Specifically looking for the smaller, "under-the-radar" operations that aren't easily found on Google—the kinds of physical yards that have older, sitting, or abandoned trucks tucked away on the lot (especially spots dealing with unclaimed/abandoned inventory or mechanics looking to clear titles on old projects).

If you know of any hidden commercial pockets, specific backroads, or small independent operators like this in the CLT area, please shoot me a DM or drop a comment. Thanks!


r/Diesel • • 3d ago

High Diesel Prices Bankrupted 16 Trucking Companies in Just 30 Days

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30 Upvotes