24 Valve Engine and Drivetrain Discuss the 24 Valve engine and drivetrain here. No non-drivetrain discussions please. NO HIGH PERFORMANCE DISCUSSION!

Push accelerator, not accelerating

Old Jun 14, 2005 | 09:08 AM
  #31  
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From: Back in Austin Texas area
Mine has been doing it while I am going down the road. I have had my fuel pressure guage since i first got the truck new. I got rid of both jusnk lift pumps when they were letting it go to 7 psi W.O.T. I have the Fass pump on there now, but I know i am going to need a pump. Oh well guess I will take it in when it quits.
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Old Jun 20, 2005 | 06:34 PM
  #32  
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From: Port Deposit, MD
Monday night, still no truck. Service manager claims they were swamped and had would have it done by first thing Tuesday. A little disappointed in the time frame, but still pleased that I am covered by warranty.
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Old Jun 21, 2005 | 06:31 PM
  #33  
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From: Port Deposit, MD
Got her back this afternoon. Dealer tried to charge me $67.00?

I was a bit upset by this considering the amount of time it took them to get everything buttoned up.
Does $44.00 seem like a little much for a fuel filter? and $22.00 to install?
Service manager seemed a little P/O'd by my disgust with the Mopar parts pricing, but the Customer is always right. (Right?)

He Comp'd the filter and labor, I was a happy Dodge customer.
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Old Jun 22, 2005 | 12:04 AM
  #34  
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glad to see you got it back, hope it all works good.
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Old Jun 22, 2005 | 05:16 PM
  #35  
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From: Cummins Technical Center, IN
Re: ...and again

Originally posted by BARTMAN
......and again, we talk about the lift pump.
Its a known, repeatable problem. Why do people continue to dick with it???
Do it right the first time or don't do it at all.



The reason people continue to "dick" with it is because a FASS or Airdog WILL NOT PREVENT VP FAILURE!

I just had my VP changed yesterday under warranty. 40K miles with perfect Fuel Pressure (never less than 6 before Max flow at 22k miles, then never less than 10), and almost always used lubricity additive!

So why would a guy in my situation pay $600 for LP setup that WILL NOT PREVENT VP FAILURE??

I mean, it's all about keeping the VP alive, right? If they can fail with good FP, then they can fail-- PERIOD. It doesn't matter if that good FP is coming from the factory LP or from an expensive FASS or AirDog setup. Does it? Or maybe the removal of entrained air magically means that the FPCM (the electronic pump brain) will magically operate much much cooler and never fail electronically???

If every VP failure was mechanical, then I'd buy give the FASS or AD more of a shot. But since most VP failures I've read about in the last few years are NOT mechanical failures, then all the lubricity, fuel flow, entrained air removal etc in the world will NOT prevent VP failure.

I think it's time we addressed FPCM failures, and the electronic failure mode, not just mechanical failure.

JMO


jh
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Old Jun 22, 2005 | 10:04 PM
  #36  
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This is interesting. The same thing happened to me last week when we were in Colorado on Vacation. The engine light came on about 2 hours from Denver at 7pm, didn't have much choice so we kept on to Denver. On the way to a dealer the next morning it would idle and nothing else, good thing about the 6spd a guy can do 35 mph idling in 6th. Glad it didn't happen 2 hours east of Denver though. Anyway I finally get to the dealer and they put it on the computer, the verdict is a bad throttle position sensor/controller. Cummins warranty covered it and we were on our way. Anyone think I should have the pumps checked out as well?
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Old Jun 29, 2005 | 02:43 PM
  #37  
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My VP44 just was changed out at 88000 miles. The truck had been throwing codes for the past 2 months. This code is only fixed with the VP44 change.

I like Hohn have had good LP pressure but the injection pump still failed. This injection pump is a bad design the issue is not fuel pressure to the pump rather the pump design. If you research the ISB engine you will see that on many school buses and RV's that his pump fails. Even though they have a different LP configuration. It points back to the VP44. The new CP3 injection system is much more reliable and I have not heard of any of the 03,04 or 05 trucks having a injection pump issue.

I hope this pump lasts but you never can tell. This is a major concern b/c of the possibility of causing an accident. I think it would be wise for us as owners to contact the NHTSA (http://www.nhtsa.gov/) and file a complaint about this issue. The only way a recall will happen is if there is documentation of failures and loss of life/property.

-CM
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Old Jun 29, 2005 | 02:59 PM
  #38  
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From: Port Deposit, MD
Originally posted by Tony H
This is interesting. The same thing happened to me last week when we were in Colorado on Vacation. The engine light came on about 2 hours from Denver at 7pm, didn't have much choice so we kept on to Denver. On the way to a dealer the next morning it would idle and nothing else, good thing about the 6spd a guy can do 35 mph idling in 6th. Glad it didn't happen 2 hours east of Denver though. Anyway I finally get to the dealer and they put it on the computer, the verdict is a bad throttle position sensor/controller. Cummins warranty covered it and we were on our way. Anyone think I should have the pumps checked out as well?
You are one of the lucky few (even though most of us don't care cause of the warranty coverage).
I would be curious what codes your truck had when they replaced the TPS.

They can do a "flow" test at the dealer, not sure how reliable it is.
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