Possibly a cracked nozzle retainer nut... if you have foam at all the injectors either compression is being blown into the inlet rail, or you are still missing a vacuum leak between tank and pump. Bad injectors like that are rare, plus you said it was running poorly before all this work... I am hesitant to blame this on the injectors. Hook up a temporary fuel system directly to the suction side of the pump. Bypass everything, including the tank. If you still have foam, it is the pump or bad injector. No foam, there is still an air leak between pump and tank. Sometimes, it helps to put another pair of eyeballs on the project... when these projects drag on for days you get frustrated and start going blind to little details. Went to a friends house last week where he had been trying to start a IHC 9.0 for two days after eliminating the water separator, which had failed ( (1987 school bus). Now a 9.0 is about the easiest engine to bleed, ever. Operating the hand pump, absolutely nothing. Started checking over his work and found he had neglected to tighten the Union of the two lines where he removed the water separator. Just silly stupid mistakes you can make when you start getting disgusted.
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Today's Featured Article - Fasteners: The Nuts and Bolts of Nuts and Bolts - by Curtis Von Fange. The nuts and bolts of nuts and bolts is an interesting and essential piece of knowledge that applies to our older tractors. An improperly torqued capscrew on an engine head or a shear bolt that is too hard on the driving shaft of a bushog can create havoc and make an expensive and uncalled for repair. Let�s examine the purpose and design of these fasteners in order to ensure their proper use. Fasteners are probably one of the aspects of mechanics that is given the least amount of thought.
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