Engine/Transmission (1998.5 - 2002) high pressure rail

[champspa]

the more of this type injection system gets on the market , the less I'm inclined to by a new truck, seems like leaking injectors are more and more frequent , can't cummins make something as reliable as the inline p-pumps again (new isn't always better) Ford has had problems with this since conception and it's starting to show up here . Oo. :--)

 

[EGaskamp]

I've often wondered that myself. With each new product the reliabillity factor goes down dramaticly. I never had a problem in the world with my p pump on my 12v.

 

[bmoeller]

We have the EPA to "thank" for this. Cummins probably would've kept to the P-pump, otherwise.



Some nice things have come from some of it though. Adjustable power (and smoke ), by a turn of the knob or push of a button. Starting at colder temps without being pluged in. For those who like quieter engines have that, too.

 

[Bob4x4]

To start,I would like to say I love my old 12 valve. Best vehicle I have ever had. But I will say when the 12 valves were new I worked on a lot more of them then I do on the 3rd Gen trucks now. Granted not on the injection pumps or injectors,but many power concerns,starting issues fuel leaks,injection timming out of spec,and many other little things. To date I have only replaced 1 injection pump(a contamination issue) and 3 lift pumps,one set of injectors(extrude honed bad out of the box). I personally am very impressed with the common rail system,but it is hurting the pocket book The risk is there for a down truck in the middle of no where(my favorite place)with all those electrons running around but the odds are very low from what I am seeing.



Bob

 

[lil red cummins]

i know we have had at least one person (ceaman) on this site that lost 2 engines because of injectors malfunctioning, but i think that if you look at the percentage of total units produced versus units failed, you will find it down to a fraction of 1%. i am happy with mine - so far. none the less, jeremy has lost a lot of money and time with his problems. would this have happened if it wasn't HPCR technology? can't say.



on the up side, the HPCR technology has made it easier for us to get an amazing boost in power just by plugging in a box. thats a lot easier than changing injectors or tweaking pumps, as on the earlier units.



its probably too early to tell. the oldest units are only approaching 3 years. (right?)



ask me in 5 years how i feel about this subject.



just my . 02.



jim

 

[Gary - K7GLD]

WELL, the manufacturers had BETTER get their electronic "open/close" technology worked out, cuz their NEXT big act is to do away with the camshaft and operate the intake and exhaust valves the same way - all computer controlled...

 

[Ol'TrailDog]

With each new product the reliabillity factor goes down dramaticly

I'd suggest reading the article latest issue of TDR (unfortunately I took it over to the house this morning). Luckily I can link to an earlier thread with the salient info:



https://www.turbodieselregistry.com/forums/showthread.php?t=123216



There she be. The reliability stats on the 3Gs are pretty impressive - better than the 94 to 98 12v. Some old myths die hard. As far as comparing apples to apples, one would need to compare the p pump to the rotary CP-3 pump reliability and the injectors to the injectors. Notwithstanding, I'm confident the 12v injectors probably had a better track record. But I sure like the other goodies they stuffed in the early 3G HOs.



So, just like a good warranty station, you need to pay attention to what your trucks is trying to tell you, whether it's low fuel pressure with a VP44 or a noticable noisy injector with the 3G, valves jonsing for adjustment on a 12v, and etc.



Unless I'm mistaken, which unfortunately happens on a regular basis , the Ferds have some sort of HEUI injection system. Again, a different beast of different color.