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My car failed Smog inspection for small leak in EVAP system and system too lean bank 1, OBD2 code...
I just rebuilt a 2.2L Ecotec engine. When I rotate the crankshaft to check timing, the timing chain jumps quite a bit at the top between the camshaft sprockets when the lifter lobes release. Is this normal? Any measurements for slack?
I already ensured that the valves are closed when the pistons are TDC, all else seems fine.
Mechanic did not set my timing correct. Not sure if he checked the timing marks on cam and crank ...