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Join Date: Dec 2009
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In the truck, you can test them by doing a cylinder contribution test, a buzz test, or by watching the %deceleration (PERDEL) with a scanner. You could also observe the oil flow from individual injectors while the engine is running. Out of the truck, there are injector shops that can bench test them.
However - injectors won't cause a change in cranking speed. That sounds more like batteries and/or starter issues. Also, the miss could be from one or more bad glow plugs.
2003 F-250 XLT Crew Cab 7.3L, Chrome BigTex Grille Guard, Quad pillar - 3 ISSPRO gauges (trans, pyro, boost) and DP-Tuner F6; Roush fuel pressure / temperature / oil pressure gauges, Ford Severe Duty AIS, 31 row 6.0 transmission cooler, ScanGauge II, Marinco mod, Walker BTM