What is an HEUI System you may ask? When it was first introduced, HEUI systems revolutionized diesel technology in groundbreaking ways. Though other technologies have taken the forefront since its development, HEUI systems are still extremely common throughout the diesel industry. From our team here at Melvin's Auto & Truck Repair in St Augustine, FL, here’s a quick look at how these systems work, and what the advantages are of having one.

At Melvin's Auto & Truck Repair in St Augustine, FL, our priority is keeping your Dodge, Chevy, or Ford truck reliably on the road. A major aspect of that is catching small issues before they become bigger ones.

Injectors are a primary component on any diesel engine, old or new. Whether you drive a Chevrolet, Ford, or Dodge pickup, clean and fully operational injectors are an absolutely essential aspect of maintaining an efficient and powerful engine. At Melvin's Auto & Truck Repair in St Augustine, FL, we offer a variety of injector solutions, from cleaning them, to diagnosing problematic injectors, to replacing them.

The automotive market is always fast-changing, and leaps and bounds have been made in the past couple of decades concerning both diesel and gasoline engines. With gasoline-powered trucks achieving more power than ever, purchase costs being lower, and fuel costs at an all-time low, many fleets are switching over to gasoline-powered fleets. However, diesel still offers some distinct advantages - it really depends on what you're looking for for your fleet of vehicles. Here are some points to consider, from Melvin's Auto & Truck Repair in St Augustine, FL.

You’ve likely heard that diesel engines are ok to idle indefinitely, and that it’s even good for them. Where does this logic come from, and is it true? Melvin's Auto & Truck Repair in St Augustine, FL has the answers.

Whether you drive a Chevrolet, Ford, or Dodge diesel pickup, there will come a day when it’s time to ask the question - has the time come to get a new truck? Melvin's Auto & Truck Repair in St Augustine, FL is here to help you decide.

You trust your diesel to get you to point A to point B every time you get into your truck. However in return, if your truck starts to act differently take the time to pause and listen to what your truck is trying to tell you. Issues can be as small as a thermostat going out, which if fixed now could reduce a more expensive repair down the road! The thermostat in your truck is a small, simple, and critical component. At Melvin's Auto & Truck Repair in St Augustine, thermostat replacements are just one of many repairs we tackle.

Whatever type of truck you run in your fleet, they all have a driveshaft that connects the transmission to the differential, transferring power to the wheels. At Melvin's Auto & Truck Repair in St Augustine, FL, we specialize in diesel truck and fleet vehicle maintenance and repair, including precision driveshaft care.

Every time you get into your diesel truck you probably forget all the safety features your vehicle has for you in case of an accident. Airbags are one of the greatest features of modern diesel trucks, though they aren’t often considered until you need them. From Melvin's Auto & Truck Repair in St Augustine, FL, here’s a nod to one of the better vehicle advancements of our time and why it's important not to ignore warning signs.

Diesel engines are known for their durability, but even the best engine has to be replaced every once in a while. At Melvin's Auto & Truck Repair in St Augustine, FL, we want you to be aware of signs that your engine is about to call it quits.

Whether you drive a Chevy, Ford, or Ram diesel pickup, your engine is likely equipped with an injection pump. While injection pumps have been gradually phased out on modern engines, they are still an integral part of most diesel engine operations. At Melvin's Auto & Truck Repair in St Augustine, FL, we specialize in maintenance and repair on Cummins, Duramax, and Powerstroke engines, including injection pumps.

Your truck was built for work. Whether you drive a Ram, Chevy, or Ford diesel pickup, your truck was designed to endure, day in and day out. Nonetheless, eventually, there will come a time where your engine needs major repair - and you’ll have to make a decision on what to do next. At Melvin's Auto & Truck Repair in St Augustine, FL, we’re here to help.

You’re Chevrolet, Ford, or Ram diesel pickup is a heavy-duty machine, designed to tackle all kinds of situations. The ball joints that connect your suspension to the rest of the truck are under a tremendous amount of strain, both on and off-road - it’s important to keep an eye on them, and make sure they’re in proper working order. Here’s how to gauge the condition of your ball joints, from the professionals at Melvin's Auto & Truck Repair in St Augustine, FL.

Once your diesel truck is back on the road, you’ll definitely want to keep it running strong. At Melvin's Auto & Truck Repair in St Augustine, FL, we’ve got you covered.

Trucks aren’t like cars...your average personal vehicle usually holds about 5 quarts of oil, and you are supposed to change it every 3-5k miles. However, the same logic doesn’t apply to large trucks. At Melvin's Auto & Truck Repair in St Augustine, FL, we know how important proper oil changes and diagnostics are to keep your truck on the road, for hundreds of thousands of miles. Here’s what you need to know:

Keeping your fuel system maintained will prevent premature parts failure and poor running conditions. Here at Melvin's Auto & Truck Repair we have tips on the important aspects of diesel fuel system maintenance, to keep your diesel fleet trucks running smoothly - longer.

Air.Air in the system causes all kinds of issues, from hard starting, poor running conditions, or an engine that won’t run at all. If too much air gets in the system, the fuel pump won’t be able to deliver fuel, and the engine will stall, die, or fail to start.  Air enters the system via a leak or a bad seal - a deteriorated o-ring, worn component, faulty hose, or otherwise. Here we inspect your lines and connections to ensure they are in good shape and track down any leaks we notice air in the system.

Whether you drive a Chevrolet, Ford, or Dodge diesel pickup, there will come a day when you have to ask the question - has the time come to get a new truck? Knowing when to throw in the towel or decide to keep the vehicle you have can be a difficult task. Melvin's Auto & Truck Repair in St Augustine, FL is here to help you decide.

At Melvin's Auto & Truck Repair in St Augustine, FL, we see our fair share of damage that could’ve been prevented. Leaking injectors are one of the main ways a diesel engine can meet its demise - but the good news is, engine failure can be avoided, as long as the problem is taken care of.