So... we're on our way back from a cross country trip (from our home in Lake Tahoe, California - all the way to New Orleans...), and now we're in Fort Worth Texas. The truck has been running rough since before we arrived in New Orleans, and has been running progressively worse... To summarize, we called these guys on a Friday night, and amazingly they are open on Saturdays, and they tell us to bring it in. Long story short, they diagnose #1 & #3 injectors as being bad (I already had a hunch...) and the suggest that we do that "bank" of injectors. In conclusion, the truck made it back to our home on the west coast, it's now been a couple of weeks (and a another couple thousand miles) and the truck is running great. As per their suggestion, we will plan on replacing the "other" bank of injectors in the near future. A great many thanks to Mark and his shop Merry Christmas..!! Dan read more

Diesel Works - El Bull - happy to be on the road again... - Auto Repair Near Me - Fort Worth, Texas

UPDATE 3/13/25: We ended up driving over to give them another shot because we really need our truck's fifth gear fixed. However, we were advised to go to Standard Transmission and Gear because Diesel Works doesn't tear into transmissions like that. Which we did as we were told and drove our truck over there. I'll add a few stars for the upfront honesty. And I received a reply that they're closed every second Saturday. 3/8/25: My husband has been calling, left a message, and even drove by this morning around 8:30am (website says they open at 7am on Saturdays). However, no one was there! And there was no sign on the door stating if they'd be back later, no post on their FB page or notice on their voicemail box. I checked all avenues because I wanted to give them the benefit of the doubt, I don't like giving low stars to local businesses. read more

as always, Mark and his crew come through. Thanks guys for getting my truck in and out.

Zack and the guys are amazing over here!! First time I used them I had a shop install a EGR Delete Kit wrong and the guys over here got my truck fixed same day and back up and running. Second time I lost Cold air and once again 1 day at the shop and I get a phone call the next morning that my trucks ready and it's blowing cold. They're always willing to do whatever's needed to get the problem figured out without waiting weeks to get in. From Customer Service, Honestly, Fast Service and just getting treated like a normal person with no BS and always fixing my vehicles no issues after I can say I'll Never use another shop!! If you haven't been in the shop drop in and just say hi because I promise you'll leave with the best experience. If I could give you guys 10 Stars I Would!! Thank yall for keeping my Truck on the road so I can keep my Company and guys rolling. read more

Great people, very knowledgeable. Will definitely recommend to others. Won't turn a job away too small and dumb questions won't get you a snarky answer. read more

Amazing! Great communication and great customer service! I take my truck here for everything.

Superior knowledge! Excellent work! Fast turn around!! Best choice one can make! Thank you Diesel Works! read more

Mark and Zach are stand up guys! they saved me $1,800 in repairs just by being honest. My truck will never go to another shop.

Best shop in DFW! They went the extra mile to make sure my truck was fixed and fixed right. Amateurs fix things until they get it right, Professionals fix things until they get it wrong. This shop is professional. Mark and his staff were awesome to deal with. read more

As always they did exactly what they said they were gonna do for a reasonable price. They even notified me of other issues that I had that I was not aware of and offered me the opportunity to get them taken care of. Now they did some warranty work for a water pump that I did not know was leaking, but they noticed it and they took care of it and warranted it without my knowledge. I appreciate the honesty and good work I've never had to take something back for a second time. I haven't trusted the care of my truck and they have not disappointed me. read more

As usual, Mark was very helpful and knowledgeable about my Powerstroke 6.7 issues today. Just needed to check an electronic issue and get 2 new front shocks. He got it taken care of while I waited. That's why I drive nearly 50 miles to his shop. 5 stars, as usual. read more

Mark and the team up there do an excellent job in a timely manor no matter what the job is. They'll continue to earn my business for years to come. read more

Got my problem fixed. They got my truck out when they told me they would. Very knowledgeable and courteous.

The folks at Diesel Works saved my bacon and did it in style. I had fuel problems in a 2000 Ford PowerStroke while on a trip to Fort Worth from Houston. They were quick to fit me in and had me back on the road Monday afternoon (would have been Saturday but they found the problem behind the symptoms). They gave excellent advice in a professional manner and fixed the things I needed at a very fair price! read more

They did an excellent job on my truck!! Great customer service and communication!

This shop misdiagnosed my truck. Removed good part from truck and replaced with off market part. I was told that wheel hub on my car was bad and needed to be replaced. As there was back order on the part, they made me to purchase off market part. The truck was making same issues as before replacing the part and all warning lights were on on my dashboard. I brought "bad part" with me to the dealer, as issue was not solved. The dealer was able to put my original part back to my truck and with tire replacement and alignment truck was running fine again. The Diesel Works is not competent in their job. They take advantage of the customer's trust. read more

We take my husband's truck here. They always do good work. They are really great people to work with.

Have been going to Diesel Works for 10 years and if you want job done Right go to Mark and his staff. From top to bottom a great place. Mechanics to office personnel. read more

I've not only owned quite a few cars in my lifetime but I have also worked in the car business for over 6 years at dealerships like Acura, Ford, Toyota, Honda etc. Meaning I've made friends with techs and service advisors and have seen what they are really up to when customers drop vehicles off and how they make money on customers. I've got to say it's definitely made me VERY PICKY on who I trust with my vehicles and where I'll take it. To the point where I sometimes won't even get mine or my family's vehicle worked on at a dealership I work for unless it's a certain tech. Well I have had only the BEST experiences here at Diesel Works! Mark is an amazing owner that knows how to treat his customers and is a man of his word. He will let you know what ACTUALLY needs to be done. I've been here several times and I can't imagine taking my truck anywhere else. Not even to the manufacturer dealership cause they always take to long or try and over charge and play games. Here at Diesel Works they were the ones that inspected my truck for me before i bought it. They are the ones that have done all my oil changes and my transmissions fluid changes. After I had an accident and hit a wall doing 80 with my truck I had them look over it and they fixed a pulley that I could hear squeaking like crazy. I had them do a full delete and tune on my truck. All these things were done on different times and every time I get the same 5 star customer service from the whole team and every time I end up saving money. I know this cause just for fun. I tend to ask friends that are service advisors or tech at other dealerships how much they would charger me and it always seems to be more lol. To put it simply. If you have a Diesel truck and you want 5 star customer service with no games or trust issues if your getting a realistic fair deal with people that actually know what they are doing and won't mess up your truck. This is definitely a great decision and you won't regret it. read more

Great diesel repair center. Took truck in with no appointment and they replaced my shocks and steering dampener (that I supplied) and a coolant filtration system. Waiting area was comfortable with coffee and a TV. I'll definitely be going back for any future service needs. read more

Mark and his crew no matter what the problem is with my truck always get me taking care of quickly.