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injection pump?

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injection pump?

joepa1277 joepa1277
New User | Posts: 2 | Joined: 07/11
Posted: 07/06/11
04:14 PM

I have a 99 dodge 2500 with 177000 miles. I bought the truck used so i am not sure if the injection pump has ever been replaced. The truck will crank fine and will idle with no issues but as soon as the accelerator is pressed it will choke down. There is no black or white smoke. I have an inexpensive code reader that is pulling po251,po252, and po1688 which the parts store says is injection pump related. Any help on this would be greatly appreciated.  

diesels-built-by-cecil diesels-built-by-cecil
User | Posts: 104 | Joined: 07/09
Posted: 07/06/11
06:47 PM

The PO251 is Fuel Injection Pump Mechanical Failure Fuel Valve Feedback Circuit
The PO252 is Injection Pump Fuel Metering Control "A" Range/Performance
and the PO1688 is Internal Fuel Injection Pump Controller Failure.
So unfortunitly man that means you are on your way to a new pump. I would go with a bigger pump like from Industrial or Scheid. Something that will have performance but wont take a *** very fast. I would also up your fuel supply with there a FASS or an Airdog so that you know you are always getting the right fuel pressure.  

joepa1277 joepa1277
New User | Posts: 2 | Joined: 07/11
Posted: 07/24/11
03:54 PM

thanks for the help..ive been looking at the airdog and leaning towards the extra money to avoid this problem in the future  

444getsitdone 444getsitdone
Enthusiast | Posts: 455 | Joined: 12/10
Posted: 07/24/11
04:34 PM

the  FASS or Airdog should be put in at the same time as the injection pump.  
NEVER Been "Found On Road Dead"
E99 Ford F350 CC, LB, 2wd, 332,000 miles 20 MPG, AIS Air intake, 203* tstat from Dieselsite.
09 Jetta TDI 111,000 miles 44 MPG, no mods.

To be prepared for war is one of the most effective means of preserving the peace.
-George Washington.

Jason Sands Jason Sands
Moderator | Posts: 632 | Joined: 03/07
Posted: 07/24/11
05:15 PM

170K sounds about when they go out....get another one, and you'll be good for another 170K Wink  

1989 Dodge D250 "Project Rust Bucket" 14mm Scheid VE pump, 5x25s, 47RH by J&H Performance, 62mm S300, dual wastegates, ARP studs, o-ringed head, NX two stage, 972rwhp on two guns.

1995 Dodge 4x4 "Project Triple Threat" Goerend Trans, Secret squirrel stuff by Garmon's 433/842

greenthunder7.3 greenthunder7.3
User | Posts: 115 | Joined: 04/11
Posted: 07/26/11
09:37 PM

be sure when u replace it to roll the engine over so the key on the pump shaft is up when u press it off. i've heard bad stories of people losing the key down in the front cover.  

99 f-350 superduty gtp38r turbo, dieselsite heui pump, southbend dual disc, regulated return, fass, autometer z series guages, 4 in downpipe to 8 in stack, afe intake.

K5Gringo K5Gringo
New User | Posts: 16 | Joined: 05/11
Posted: 08/29/11
01:47 AM

Surprisingly my VP44 lasted about 150,000 miles with a Smarty turned up all the way, a TST Power Max Comp box turned all the way up. And pretty big injectors. I asked around about the different companies and decided with Scheid Diesel. I got the hot rod pump while I was already spending big money. One person told me that their friend got a hot rod pump from Industrial Injection a few years ago and had problems starting. I would hope they fixed it by now. Just know that if you end up getting a hot rod pump, your EGT's will go up significantly. With all my fuel modifications, I can hit 1200 degrees accelerating normally on the street. Its time for me to address that issue in another post. It works great, but it idles rough as a hot rod pump most often does. I hope this helps out and doesn't make your decision harder.  
'02 Cummins, Goerend trans, SMARTY S-03, TST Power Max Comp box, Fass Platinum 150, 100hp injectors, straight 5" exhaust, wastgate, fiberglass fenders, leveling kit, 35x1250x17 BFGs, fabricated front bumper