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Sprinter Injector fuel quantity test

sprintergurusprinterguru Member Posts: 24
edited March 2014 in Dodge
If you have hard start, no start, lots of smoke try this:

1. Remove the plastic injector cover (aka valve cover)

2. Remove the clip at the top of each injector. Use a hook pick and just pull the clip sideways. Remove the fuel injector return lines from the top of each injector.

3. Take a small vice grip and squeeze this line closed at the rear of the engine head or just behind the number five injector fitting. You are just keeping fuel from coming out of this line while cranking.

4. Buy a couple feet of 3/8" ID clear vinyl tubing at Ace hardware. Cut yourself five 4" pieces of this tubing. Now your going to install the tubing onto the top of each injector, the tube will fit nice and snug around each injector top where you removed the return lines. Now you should have five clear pipes sticking up off your injectors. These will be like beakers that capture bypassed fuel that is forced through the injector during cranking.

5. Disconnect the cam sensor near the number five injector, this will keep the engine from starting.

6. Crank the engine for about 30 seconds non stop. Take a look at your injector tubes. You should not have more than about a 1/4" to 1/2" of fuel in those tubes, if you have an 1" or more or more fuel in one tube than another you have a bad injector or a whole set of bad injectors. Lets not be super picky here an 1/8" difference is not an issue between injectors. Im talking an inch in one injector and a 1/4" in another.

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