New lift pump

Reply Subscribe

Thread Tools

Search this Thread

Mar 30, 2003 | 10:48 AM

Guest

Guest

Posts: n/a

New lift pump

Dodgeboy59td and I installed a new lift pump (the 3rd one) on my truck yesterday while installing the E-brake and I took off the fuel filter canister and after we got done I could not hear the lift pump running to fill the canister, it took a couple of times of bumping the engine to get the lift pump to run. After a couple of times the lift pump would run and something it would not run at all. This is a new pump also, after I got the truck started I got 14psi at idle. last night sometimes it would run and something it would not run when I turned the key to the on postion. Shouldn't it start to run for a few seconds at each start?

Mar 30, 2003 | 03:09 PM

Tom

Registered User

Joined: Oct 2002

Posts: 83

Likes: 0

From: Houston

Re:New lift pump

Cattle Hauler, I believe they are supposed to engage each time. I could be wrong though. I don't hear mine everytime, but then I don't pay attention each time I turn the key over. Maybe some of the other guys will provide more information. Tom

Mar 30, 2003 | 03:14 PM

Monty

Administrator

Joined: Sep 2001

Posts: 1,440

Likes: 2

From: Mustang, OK

Re:New lift pump

The ECM will send a 12v signal to the lift pump when the ignition is in the start position. At this point, the lift pump will usually run for about 5 seconds. If the engine is turned over and it does not start, the ECM sends a 12v supply signal to the lift pump to run for 30 seconds to prime the system.

Mar 30, 2003 | 09:34 PM

DarrellB

Registered User

Joined: Jun 2002

Posts: 588

Likes: 0

From: Lanesville, IN

Re:New lift pump

CH, check and make sure the new pump is plugged in good. I know it sounds stupid but it could have something to do with it. You might want to get some Dielectric grease and spray in the ends of the plug as well.

I just mounted my permenent fuel gauge in the truck Saturday and it's great to see what the fuel pressure is under all kinds of driving conditions. I'm going to start looking into a nother fuel supply pump or a pusher set up just to keep the VP44 happy.

DB