Now that I've got your attention...I've been tracing this problem for a while now. I have confirmed spark and compression test will be done tomorrow. Here's what I've done:-replaced all spark plugs -ecu clear of all codes except o2 sensor -replaced/tried switching coil pack -plenum pull/injector replacement (rebuilt from Z1) -bypassed ptu subharness -replaced ptu/cleaned connectors (used eBay "verified working" ptu) -replaced coil pack connector -replaced injector connector -cleaned cas -injector ohms 12.1@ injector and @ ecu subconnector -verified ecu signal to injector with 12v led -observed injector "tick" while engine running Anyone know any good z mechanics in Iowa? How feasible would it be to send my injector off for a flow test? How can I be sure my injector is firing and not clogged? Does this sound like a ptu issue? If anyone can offer any tips/advise I'd greatly appreciate it.
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