I've just replaced the injector pump in my truck w/ a genuine Cummins rebuilt pump. I gave them the engine nos. etc. so they had the info. Truck starts fine and idles fine but is very sluggish on throttle response/acceleration. I haven't taken it on the road yet. Anybody know what's wrong? -

Not sure on the sluggish responce, but try gettin in touch with these guys. I read through the horsepower articles months ago and they really seem to know a BC Cummins better then it knows itself.
http://www.dieselinjection.net/frames.html -

Cowboy_Customs's Sig:

'95 Dodge 3500 SLT Laramie NV4500 4.10LS Chevy cyl's flatbed Pacbrake 60# springs timed and tweeked Bilstein HD's 19.5's Lukes link 309K on the ticker
http://community.webshots.com/user/Cowboy_Customs

fuel delivery issues.......hows the filter look?? -

Whit's Sig:

* 01 Cummins/Dodge/HO/6 speed*275 injectors*PDR 35 turbo w/14cm housing & high pressure boots*HTT 3 piece ported exhaust manifold*Progaurd 7 with prefilter*Edge Comp*Fass II*Southbend con OFE*Jacobs brake*5"Stacks Big ens*E/F shift knob w/2low & brake switch*10 Gages*KW Ram air System cab controlled*Rickson 19.5x265's*True speed calibrator*Rancho 9000's*DT track bar*DSS steering stabilizer*KW Side impact rails*KW Traction Bars*Toolbox/fueltank 60 gal Combo*Mag High Tech Diff Cover*Ranchand bumpers*Grover air horns*Rear Wheel Cylinder Upgrade DYNO 375 Horse 941 Torque

Always remember...when life hands you Lemons,ask for Tequila and Salt and call me over!

Timining maybe? Might have it retarded to much, or advanced to much? -

DazedandConfused's Sig:

Andy
2004.5 Chevrolet Duramax/Allison LLY. 4" Exhaust, K&N, Edge Juice level 4, Guages, Ion Alloys with 285 Dayton Timberline At's, and 265,000 Miles.

I was thinking timing may be a bit advanced. Hows it idle, nice and smooth? any smoke? -

If that was a Cummins Recon pump I will bet that the aneroid is adjusted a little wimpy.
The adjustment is behind the tin plate where your throttle lever clamps to the pumps throttle shaft. Behind the plate you'll see a set screw. Loosen the lock nut and turn the set screw counter clockwise about a turn and a half. That will put the pep in your step again. -

Thanks for all the replies, guys. As it turns out, I need a pressure signal for the AFC.The old pump didn't have AFC. Anybody know where in the engine I can get the signal. I understand it is from the intake manifold but I need to use turbo boost pressure. I checked the 1/8" pipe fitting plug on the lower side of the aftercooler but I'm not getting any positive pressure so I guess it's the wrong place. -

You wont get any pressure unless you put a load on the engine. Any plug in the charge air system will work. You may still need to adjust it a bit like Snedge suggested. -

Bosshogg's Sig:

02.5 2500 4X4 reg cab white HO 6spd. Tapped Edge Comp with TST plate and Bosch RV 275 sticks. Stacks by me to roll the coal. Walbro lift pump/filter big line setup, Multi function shifter stick, Solenoid High Idle. LED's All over it
Black smoke is just advertised horsepower!!!

If I don't get any pressure w/o load, I'm in trouble. The rpm rises so slowly when I advance the throttle that I don't think I can go anywhere. I hooked up a small air pump to the afc by rubber hose and pressurized it w/ 25 - 30 psi. Wow! What a difference. Very snappy response. So, can I expect that only if I drive under load? Doesn't seem right. Thanks again guys.

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Well guys, I gave up and took pump back to the Cummins dealer. Guess what. After some research they discovered that they ordered and sold me the wrong pump! Needless to say I was a little upset and let them know it. At the same time I was relieved that a problem had been found. They are having it recalibrated and I'll let you guys know how it runs.

I guess Snedge was closest. It is a pump adjustment.

More after I reinstall.

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Installed the pump today. Works great. Let this be a lesson to everybody. Just becuase the recon part came from the dealer, it may not be right. Thanks again to everyone who helped. -

Cody, Glad you got it figured out. I agree you can't always assume you will get the right part just because the guy who sold it to you had the right shirt on. I'll have to admit though, it's tough to screw up now a-days with the automation of parts ordering. If you gave them your engine serial number to start they should have all the tools to get you the right part the fist time.
Good luck. -

Wow glad you got that figured out, I cant immagine your frustration. Keep that Big cam a rollin, you got one of the last good mechanicals! -

One thing you need to keep in mind on this is that it is a PT fuel system it stands for Pressure ---Time.The actual inj timing is controled by shim/gaskets under the cam followers.The only other timing is on the front gears and unless the assecory drive is removed that will not change -

i love cat but can somebody tell me the bc-4 cummins is a a good engine -