The fuel supply system is one of the most important aspects of a diesel engine for obvious reasons, but it also happens to be one that’s exceptionally complex, relying on numerous working parts and components to perform optimally. These amazing systems are designed to work overtime to ensure that your diesel engine is performing at the levels you expect it to and today, innovation has triumphed to yield amazing systems—some can even return up to 70 percent of supplied fuel!
Fuel return is actually a crucial functional aspect of your diesel fuel system and the reason it’s so important is for cooling and lubrication of the fuel system components, including diesel injection pumps in Fredericktown, OH. But, what this also means is that if the engine is starving for fuel, it lessens the return fuel and hinders the cooling and lubing of the injection system, resulting in issues like fuel starvation or fuel cavitation or aeration (air in the fuel). It’s no secret that these troubles cause severe damage and very costly repairs.
As you may already know if you’ve had issues with a fuel system or diesel injection pumps in Fredericktown, OH, tracing a fuel supply issue can be very frustrating. At PurrFormance Diesel, we’ve seen our fair share of fuel system troubles and as a result, we would like to provide some technical pointers on diagnosing a fuel supply issue:
- First, you must determine what type of supply system is on your engine. If you have a supply pump, make sure the supply pressure is within factory specs. If not, there may be a restriction on the suction side or maybe a simple issue like a clogged fuel filter. If there is no supply pump, the restriction may be causing excessive vacuum on the system. This in turn could be starving the engine for fuel.
- The next step would be to check for air in the fuel. Where is it coming from? At PurrFormance Diesel, we are seeing more and more issues with air in the fuel coming from filter bases, rusty fuel lines, rubber braided hose crimp connections and even standpipes in the fuel tanks. Trying to figure out where the system is “sucking air” from can be time consuming, but when found, it can be the most rewarding feeling ever because we’ll be able to eliminate the problem at its source!
Stock and aftermarket parts
One of the biggest issues we find in an engine demanding more fuel is that the stock supply system can’t properly supply the engine and therefore, performance suffers greatly. This is a major issue on performance applications, but thankfully, there are many upgrades to consider that will eliminate these issues once and for all.
Once such solution is the implementation of an aftermarket lift pump, which is designed for gasoline or marine engines. And while this might not always make sense as a solution, given the traditional applications, we have found that most pumps that are ok for gasoline engines are also ok for diesel fuel.
If you’re looking for more of a perfect fit, you might look to Fass, AirDog and Fuelab, which all have pumps designed specifically for diesel engines. And, while each of these manufactures provide some of the same features—such as extra filtration and increased fuel economy—they have each integrated their own little touch that may lend itself better to your vehicle, depending on what your desired results are, including:
- Fuelab products have a brushless motor and no shaft seals.
- AirDog offers products either with a pre-set pressure, or with an adjustable regulator.
For the extreme customer who requires 1000+ horsepower, you might look to companies such as MagnaFuel and Aeromotive for a high performance solution. Either way, if you are confused or would like a little help making your decision, please call and we will be happy to assist you! We know that fuel issues and performance hindrances as the result of fuel are no fun to deal with, which is why we’ve made it our mission to be an authority on solving them!