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>Does you pickup not have enough pickup? If you are not >getting optimal performance from your diesel pickup >truck, especially if it is equipped with a Dodge >Cummins engine, the performance issue could be >contributed with the injection pump. The Bosch VP 44 >injection pump used in the Dodge Cummins engine from >1998 to the 2002 models has been to known to have its >share of issues. > >What is the Bosch VP 44 injection pump? >Bosch VP 44 injection pumps perform four basic >functions: > >Producing the high fuel pressure required for >injection >Metering the exact amount of fuel for each injection >cycle >Distributing the high-pressure, metered fuel to each >cylinder at the precise time >Varying the timing relative to engine speed. > >The Bosch VP 44 is an electronic rotary distributor >pump that can vary fuelling and injection timing, and >also contains fuelling, timing, and diagnostic data. > >The following are the top two most common mechanical >failures: > >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. > >Rotor Seizure >Another mechanical failure with the Bosch VP 44 >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. > >Overall the number one cause of Bosch VP 44 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 VP 44 injection pump. > >Preventing Bosch VP 44 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 VP 44 injection pump. > >Preventing problems before they occur is the best way >to take care of your truck. > >ABOUT THE WRITERS > >Corey Rozon and David Leonhardt would like you to <a >rel=nofollow target=_blank >href=http://www.seo-writer.com/freelance/writer.html>hi >re a freelance writer for your next article >project</a>. Upgrading to the <a rel=nofollow >target=_blank >href=http://www.thoroughbreddiesel.com/bosch/vp44-injec >tor-pump.htm>Bosch VP 44 diesel fuel pump</a> and also >to other <a rel=nofollow target=_blank >href=http://www.thoroughbreddiesel.com/edge/programmers >.htm>edge juice diesel performance products</a> can >help your truck run smoother and deliver more power. >Check out the other <a rel=nofollow target=_blank >href=http://www.thoroughbreddiesel.com>diesel >performance products and accessories</a> available >online.

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