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[william_04_X]

hey Birken,
it sounds like you already have the upper intake manifold off, exposing the Central SFI assy..you can replace a single injector..mark and pull all the poppet tubes where they are inserted into the intake manifold.. there are 2 tabs at the base of the FI block..pry them apart and lift off the FI block..be careful as the injector electrical pins are stabbed into the lower part of fuel metering body..you'll have the block of injectors loose now and you can push out the bad injector from the bottom of the FI block, while gently pulling on it's poppet tube.... be sure to get the numbers off the old part.....while you are in there replace the fuel pressure return regulator..it's just held on with a clip....if you ended up replacing that fuel pump module a few weeks ago, then the supply regulator is built into that..

FYI..these engines also have intake manifold gasket issues..it's not if, but when they will leak..usually you get a coolant smell after running the engine without being able to identify a specific source....you might want to dig a little deeper and replace them while you have so much off the top anyway..

the Haynes manual on this model of truck/engine gives good details on these repairs..

good luck,
William