This may sound dumb but is there a such thing as &quot;too much&quot; pressure? I'm getting ready to add a pusher pump (I think) but I've heard that if you force the fuel too fast through the injection pump you can wear it out faster. Any thoughts??<br>

 

[quote author=SmokinShaker link=board=4;threadid=11479;start=15#109929 date=1046394461]
This may sound dumb but is there a such thing as &quot;too much&quot; pressure? I'm getting ready to add a pusher pump (I think) but I've heard that if you force the fuel too fast through the injection pump you can wear it out faster. Any thoughts??

[/quote]
Yes some have posted that fuel pressures in the 20 psi range will cause a &quot;Hard Start&quot; condition.

 

Thanks Shovel

 

I'm with Fahlguy, That's how i'm doing my set up. I already have 6an lines from the fuel filter canister to the injection pump. Now I just need to do the rest which should be on next week.

 

I put the gauges on in June 2002. The pressures weren't that good when I first got a chance to monitor things. 12 at Idle,6-7 at 70 mph and 1-2 at WOT.<br><br>In Sept. 2002, Lift pump went out completely, luckily not on a trip at the time. Dealer replaced lift pump under 100 K warranty. Now reading 16 at Idle,12-14 at 70 mph,and never below 10 at WOT.<br><br>Never did notice any rough running or anything like the truck was starving for fuel. Without the gauge though would have probably lost the injection pump!<br><br>Recommend a gauges to keep an eye on fuel pressure, etc. <br><br>Good luck!!<br><br>

 

[quote author=Shovelhead link=board=4;threadid=11479;start=0#109050 date=1046212431]<br>Better yet, install a fuel pressure guage so you can see what's happening in real time. <br>[/quote]<br><br>Yep a fuel pressure gauge saved me from being broke down 1000 miles away from home,luckily I was close to a Cunnins dealer,bought a new pump and installed it.<br>But a gauge is a must..

 

I was down to 10 psi idle, 8 cruising at 60, 6 WOT. Changed my lift pump yesterday to a Cummins #3990082. Now I have 15 psi idle, and it was snowing like crazy yesterday afternoon, so I couldn't cruise at 60 or try WOT, or I would have crashed for sure. I am still under the 100K mile warranty, but I didn't want a hassle with the dealer about the Cummins vs. Mopar pump, so I just bit the bullet and bought the pump. My CTD is smiling again. And now I can install that EZ that Jack sold me!

 

[quote author=DarrellB link=board=4;threadid=11479;start=0#109237 date=1046240149]<br>I ordered a new fuel pressure gauge form Geno's 2weeks ago and it's still on backorder. <br><br><br>I ordered my pillar set and guages on January 17th and still havent received them. They say the guages are still on backorder. I talked to Rod the other day and he said that it is probably the Hewitt's that are holding things up. Many people have had failures with these. <br>On February 6th, my lift pump went out. I had already installed the pillar mount and the other guages. When I did the install I zip tied a fuel pressure guage to the windshield wiper and had good pressures. I hope I caught the lift pump in time to keep the injection pump in good shape. I am still waiting for the guage for the pillar mount; so I can install my pusher kit behind the new lift pump. I have all these parts just laying around just &quot;screaming&quot; to be installed. I decided to copy &quot;RADDODGE&quot;s bypass at the pump; in case of failure of the pusher pump. [/quote]

 

Great diagram of a Cummins' engine and its parts Shovelhead. ;D<br> <br>

 

What are some signs of a failing liftpump?

 

KIng, lots of times there are no symptoms until you've done some damage to the injector pump. My lift pump was gradually loosing pressure. I was down to 10 psi at idle, and 6 psi at WOT. My truck had no symptoms, the engine acted just fine, I had power, throttle response, started on first crank, even in -10*. But I knew my pump was failing, becuase I installed a fuel pressure gauge last spring. That's really the only way to know for sure.<br><br>DeWain

 

[quote author=DieselDude link=board=4;threadid=11479;start=15#114077 date=1047331574]<br>Great diagram of a Cummins' engine and its parts Shovelhead. ;D<br>[/quote]<br><br>Thank Dave Fritz for having a great website with all that info.<br>www.dodgeram.org

 

For those who have bought lift pumps, what did you pay for them? I want to see if I can get a good range here. I may need to make a purchase soon.

 

I priced one at $160 at the Glen Burnie, Md Cummins Power Store.
Bought mine for $89 at their last open house. ;D
Needed it three weeks later. :