Well, after 417 miles on my brand new truck the lift pump is dead.

 

Wow - on one of the in-tank ones? I haven't read about TOO many of the in-tank ones going out, and at only 417 miles I'm guessing it was a bad lift pump from the get-go.

How did you find out it was the lift pump? I'm assuming you haven't installed FP gauges or anything yet, and I thought the stock CP3 was supposedly strong enough to suck the fuel from the tank on it's own - or maybe I'm wrong...

 

Sorry to hear that man, hopefully it justs a fluke and it'll get fixed quick for you!

 

Yes it is an "in the tank" pump. The tech said where he measured it the pressure should be around 58 psi, and it was 7 psi. They told me to go ahead and drive it until Thursday until the new pump gets in and I said "No Thanks" They did however state that they saw a couple of unusual codes like "over boost" and one for "ecm overpower" but i had no idea what they were talking about.

 

Silly Rabbits.

Seriously though, who would want to drive a brand spanking new truck with a bad pump? Seems like that is asking for trouble (if not now, down the road?)

I would care less if the CP3 can suck fuel, it was designed with a pusher pump back there.

 

I hate to tell you but I don't think your dealer knows what they are doing. Normal lift pump pressure is roughly 6-9psi depending on temp and conditions. Our lift pumps will never see 58psi. And besides that the normal test is to check volume not pressure. There should obviously be pressure as well and 7psi is normal. I think you will find no difference in a new pump. If the pump truly was dead you would find either no start or stalling out after a few minutes. The reason the CP3 can't pull fuel when the pump is dead is because the dead pump causes enough restriction that you can't get fuel past it using just the CP3...if there was no restriction or 'dead' pump in the way the CP3 probably could pull enough fuel like the GM's do.

 

Ditto to what Gord said.

58psi... that is really funny... but I wish it were true

 

Oops, I didn't even read that part. Yeah, what they said, your truck never had or will have 58 psi. It will never have even 40 pounds lower than that with the in-tank.


Good Luck, I hope your dealer locates your issue.

 

I know 58 sounded like crap to me too, but there has been about a 20% power loss since the day I bought it. If they want to throw parts at it, I say go for it, and they will either fix it or own it, I really don't care. I still have my 02' which for now is tons more fun to drive, so I am not in to much stress at this point.

 

Yeah - I read that too and thought - 58 PSI??? Wow - mine usually runs about 6.5 to 7 PSI, and I was thinking - my lift pump must be going out too :-)

I wonder if the tech meant that it should be pumping 58 GPM, not 58 psi ??? Just a thought....

Oh - and Gord - thanks for the explanation about the CP3 not being able to pull the fuel from the tank.

 

58 psi sounds like gasser pressure..... what a maroon

 

I've read the CP3 can operate without a liftpump in some applications. The restriction with the Dodge is the 10micron filter and the liftpump.

 

The restriction isn't limited to just the fuel filter...remember that GM's also nhave fuel filters but they do not use a lift pump, they let the CP3 supply enough vacuum to pull fuel from the tank. The restriction is caused when the lift pump goes dead. There is just too much of a restriction in place to allow fuel to be pulled to the CP3. This is evident with people who run the factory lift pump and an accessory pump such as a holley blue as well. If the lift pump goes dead they are still stuck because the dead lift pump creates enough restriction that the Holley blue and CP3 can't get enough fuel through the dead pump. This is why people are installing FASS or Walbro pump setups that eliminate the restriction and unreliability of the factory pump.

 

New lift pump installed. Had them do the TSB for long crank. Now I have an even longer crank and a huge cloud of white smoke when it does decide to start. I have tried waiting for the light to go out. I have tried everything. Now I crank for about 20 seconds, wait about five, crank about 20 seconds, wait about five, crank for 20 seconds then it starts and blows white smoke like crazy. Anyone else experiencing this?

 

You have CP3 problems (or something). If it were me, I would have it back at the dealer within hours of that condition. Might want to start yourself a notebook documenting this.