Home - Cars and Trucks - TrucksA How to Minute - This Issue: Dodge Diesel Exhaust for TrucksIf you own a diesel truck, there is a good chance you have a Bosch VP44 injection pump. If you do, this article is a must read, as there are tips you may not even know to help prolong the life of your Bosch VP44 injection pump. If you are looking for a new injection pump for your Dodge Cummins diesel engine, but are not sure which is the best model, than please continue reading. In this article we explain some common failures with injection pumps. The Bosch VP44 injection pump used in the Dodge Cummins engine from 1998 to the 2002 models has been to known to have its share of issues. Related Writings: Choosing Your Truck Bed Covers - Truck bed covers, also referred to as lids are an excellent way to keep your belongings stored safely away from the ravages of weather and prying eyes while keeping them close at hand. Bosch VP44 injection pumps perform four basic functions: 1. Distributing the high-pressure, metered fuel to each cylinder at the precise time 2. Metering the exact amount of fuel for each injection cycle 3. Varying the timing relative to engine speed. 4. Producing the high fuel pressure required for injection The Bosch VP44 is an electronic rotary distributor pump that can vary fuelling and injection timing, and also contains fuelling, timing, and diagnostic data. Related Writings: Truck Tires In Review - Selection of truck tires warrants careful evaluation of the usage conditions, truck type and the manufactures specifications. Mickey Thomson, Super Swamper and Pro com are three of the major players who design and develop truck tire for different and specific applications. The number one cause of Bosch VP44 injection pump failure is a drop in fuel line pressure which is usually due to a malfunctioning lift pump. Normal fuel pressure is around 15psi and if the pressure drops below 5psi an injection pump failure is probable. Remember bad lift pumps can run unnoticed until costly damage is done to the Bosch VP44 injection pump. The following are the top two most common mechanical failures: Related Writings: Top Five Trucks For Gas Mileage - When looking for trucks with great gas mileage, the list can be pretty large. You will have a wide variety to choose from. Select the one that best suits your requirement. This article lists out the top five! 1. Check Engine Code 216 This is the most common mechanical failure and occurs over a period of time when weak lift pumps, with low fuel pressure, rupture the diaphragm in the front of the injection pump. The timing piston will then vibrate to a point where it wears the housing of the pump down until the fuel is able to bypass the piston. Dodge has recognized this problem for some time, and they no longer even sell the lift pump that goes on the side of the block anymore, instead they replace it with a unit that is now mounted in the tank. 2. Rotor Seizure Another mechanical failure with the Bosch VP44 injection pump happens when the rotor seizes in the distributor section of the pump. The most common cause for the seizure is a lack of lubrication. Since the Bosch VP44 injection pumps are lubricated by the fuel, weak lifts pumps can again be blamed for this failure. The seizure will then break the Drive Plate and the truck will stop running, never to start again, until the Bosch VP44 injection pump is replaced. Related Writings: The Persistence of SUVs and Large Trucks - Despite growing concerns about extremely high gas prices, and their effect on the environment, it seems that SUVs and large trucks are no less frequently seen on the roadways than they were 10 years ago. Preventing Bosch VP44 injection pump Failure The best way to avoid failures of the Bosch VP44 injection pump is to prevent them from happening. Purchasing a replacement lift pump, one that is of a better quality than what comes from the factory will help. If that option is too costly, you can also install a gauge to monitor your fuel pressure. With the gauge you will be able to know when your lift pump is going out and can easily fix the problem before you lose the Bosch VP44 injection pump. Preventing problems before they occur is the best way to take care of your truck. About the author: ABOUT THE WRITERS
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