I have 2003 Dakota 4.7 V8, I am looking at replacing my injectors to help with my poor idle stumbling of my truck and gas mileage. I have the manual and it says to remove the Fuel rail line I will need a special tool.

Is this what I need?

http://www.harborfreight.com/4-piece...set-96834.html

Here is the procedure to release the Fuel Pressure on my truck. Just curious why I would need to supply power to the injector for a moment.

STANDARD PROCEDURE - FUEL SYSTEM
PRESSURE RELEASE
Use following procedure if the fuel injector
rail is, or is not equipped with a fuel pressure
test port.
(1) Remove fuel fill cap
2) Remove fuel pump relay from Power Distribution
Center (PDC). For location of relay, refer to label
on underside of PDC cover.
(3) Start and run engine until it stalls.
(4) Attempt restarting engine until it will no
longer run.
(5) Turn ignition key to OFF position.
CAUTION: Steps 1, 2, 3 and 4 must be performed to
relieve high pressure fuel from within fuel rail. Do
not attempt to use following steps to relieve this
pressure as excessive fuel will be forced into a cylinder
chamber.
(6) Unplug connector from any fuel injector.
(7) Attach one end of a jumper wire with alligator
clips (18 gauge or smaller) to either injector terminal.
(8) Connect other end of jumper wire to positive
side of battery.
(9) Connect one end of a second jumper wire to
remaining injector terminal.
CAUTION: Powering an injector for more than a few
seconds will permanently damage the injector.
(10) Momentarily touch other end of jumper wire
to negative terminal of battery for no more than a
few seconds.
(11) Place a rag or towel below fuel line quick-connect
fitting at fuel rail.
(12) Disconnect quick-connect fitting at fuel rail.
Refer to Quick-Connect Fittings.
(13) Return fuel pump relay to PDC.
(14) One or more Diagnostic Trouble Codes (DTC’s)
may have been stored in PCM memory due to fuel
pump relay removal. The DRBt scan tool must be
used to erase a DTC.

 

Why are you replacing them?

There are services that run a very strong cleaner through them in the truck for about $100 in and out.

 

Walmart has it for about 40..

 

I have 140,000 miles on the truck and figured it could not hurt.

 

They do ok I never looked

 

walmart just puts a can of fuel injector cleaner in the tank. and you dont need the fuel rail disconect tool but it makes it easier to remove the entire rail. 4 8mm bolts hold the rail in the top of the head.

 

Eh.. the one's around here do a high pressure flush and puts a can in the tank.. they are using a gum out product.. down here. My aunt had her PT cruiser done there.. big difference from before..

They also sell a DIY that you hook to your fuel rail as well at the parts store.. I forget who makes it..

 

Try using a strong cleaner like Sea foam first

 

if you have a injector shop like i do around you take yours in and next day 16 bucks each you have 100% rebuilt injectors

 

I have used three methods to clean injectors.
1. Home brewed syringe and carb cleaner
2. professionally cleaned and flow tested
3. OTC professional pressurized cleaner. This one hooks up to the fuel rail and pushes cleaner through the injectors.

In my opinion #2 was a waste of money, mostly because I was over charged. The guy also said that there was almost no change in flow before and after cleaning. This was do to the fact that I cleaned them using #1 before I took them to his shop but I was still concerned they were not clean.

#3 is the way to go. No need to pull the injectors which is a PITA, just fill the canister remove the fuel pump relay and start the truck. I just did this with the Dakota I just bought with 133,000 miles and it stopped the shuddering idle and improved the MPG.

Here is a link to the tool:

Use with this cleaner: