Quote:
Originally Posted by sv51macross
Update:
-That aside I removed both manifold injectors and spritzed some brake cleaner through the vac nipple, injector orifice, and the banjo bolt orifices. Did the blow/suck test and one I could both blow and suck through the vac nipple, the other would blow through and allow a little air to suck through. Haven't tested the housing injectors, but it seems that only one of the four injectors is actually working.
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^Interesting that you mention this. I've got my engine apart now for some other work, and since the oil injectors were easily accessable I pulled them all out and did the suck/blow test per the FSM (Ok wise guys, stop snickering!). My results were similar to yours - I could blow thru all of them, but when trying to suck a vacuum, only one truly passed the FSM test. To get more repeatable & measrable results, I repeated the suck test with my Mityvac vacuum pump on each of them and found that only 1 injector would HOLD a vacuum for at least a few minutes; all of the others would just start to build a vacuum, but then bled down to ambient pressure at various rates.