Its on a 06 with 100k miles, white smokes a little when cranked and when tached up it hangs and is slow to come back down, the tick seems to go away with just a little throttle. If you kill the injector on #4 it quits so I was thinking it was probably the injector but I swapped #4 with #1 and still the same result, kill 4 and it goes away. I'm going to pull the valve cover back off and check the valve adjustment (should have did that to start with) but I really don't think that will be it. I've also checked the coolant with a combustion leak tester and everything looked good. If the valves check out I'm going to do a compression check next, I was kinda thinking piston slap at first but with it stopping when the injector is shut off makes me wonder, anyone have any ideas? Maybe electrical?
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