Engine/Transmission (1998.5 - 2002) in tank lift pump install?

[mattymac]

Tryin to help a buddy on his 02, he ended up getting a brand new intank lift pump kit from mopar for basically nothing and wants me to put it in. If he had to pay for it he would have went aftermarket for sure but he ended up trading for it, so the price was right.



the truck has like 250K on it with the original VP44 and lift pump!!!!! His pressure just started to drop so a new intank is better than the stock carter.



Where does the single orange/red wire go to coming OUT of the relay get hooked into???



Does the intank pump get power from the sending unit wires???



The fuel manifold goes in place of the stock carter pump with fuel lines in and out, but it came with special studs, does anyone have a pic of how this is supposed to get mounted?



I tried searching but came up empty on these ?'s.



TIA!!!

 

[Sticks]

Do both the in tank and a replacement block mounted pump. You will have to make a "Y" splitter (better than wire taps).

The in tank pump, contrary to what Dodge preaches, is not anywhere near adequate for the VP44.

The in tank kit comes with good instructions and wiring harness, and will tell you what pin needs to go where on the stock wiring harness that connects behind the left front fender.

 

[Bob4x4]

The connector you are looking for is under the cab near the body mount

 

[mattymac]

heres the relay as it came in the box. It didnt have any paperwork for instalation??



I have the female plug end that gets hooked into the stock liftpump plug.



12v+ battery power.



but I dont know where the single wire (orange/red tracer) goes. It has a special end on the wire that obviously plugs into something I just dont know where??





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[mattymac]

heres the rest...





#ad

 

[Sticks]

You need to get the dealer to print out the instructions for you. They used to come with the pump.

The wire with the mini spade (or pin - depending on year) gets installed in the OEM harness under the cab behind the LF fender. Some truck only had one open slot, others had several, I do not remember which position it goes in.

That wire is the one that sends the power down the line to the fuel sending unit to power the in tank pump. The 2 pin connector that connects to the original LP plug is the signal line to the relay. That is where you will need to make a "Y" splitter (adding on a male plug end) to connect to a new block mounted pump, and ditch the aluminum replacement block.

The end result should net you 23-26 psi at idle, and 17-20 psi WOT no load with both pumps, and last a very long time.

Hopefully someone here with the same year of truck that has the in tank pump can take a picture of the connector where the new pin gets inserted into the harness connector so you can see exactly where. If it is a spade connector, you need to make sure you have it inserted the correct way with the locking tab.

 

[mattymac]

anyone know what plug to hook into with the single spade conector?





Ill end up doing the "Y" in the harness. If the stock LP goes out does it create a restriction for the in tank pump??



And its been a while for me on these VP44 trucks, if im getting 23-26psi at idle im assuming the pump can handle the pressure?? I thought there were some seal issues with to much pressure??

 

[Bob4x4]

Most vp44 trucks will have a hard start above about 20 psi.

Your wire plugs into the harness down by the body mount. There will be a plug in the hole (remove it)where it needs to go to keep water/dirt out. You also need to remove the lock piece out of the connector to allow the new pin to be inserted. You will see a wire of the correct color on the opposing half of the connector. The rear harness is the same as a gas truck so the fuel pump feed wire already exist in that harness

 

[Sticks]

And its been a while for me on these VP44 trucks, if im getting 23-26psi at idle im assuming the pump can handle the pressure?? I thought there were some seal issues with to much pressure??

It was SOP at the shop that I worked at. Never had any hard start complaints afterwords.



The regular customers that we had, we always checked the fuel pressure regardless of why the truck was in and never saw any of the doubled up pumps have any problems or start showing a drop in pressure more than 2-3 psi.

 

[mattymac]

thanks guys! should have time to work on it today!

 

[GSatler]

why does dodge say u need a reflash when u convert to a in tank pump

thanks gregg

 

[Sticks]

why does dodge say u need a reflash when u convert to a in tank pump

thanks gregg

My guess is that they want your money.

 

[grimesja]

I would never put another in-tank pump in my truck. But the install is fairly easy. The plug behind the fender in left wheel is a pain. Separate the plug from the rear harness, take pliers and disassemble the plug, then push the pin in until it clicks and re-assemble. If he wants to sell the old module, give me a shout.