noticed a missing part, that could be adding to problems

Went over to my sons today to recheck wiring and listen for any hissing on the air pipes on his megane 2003 1.4 petrol, sadly we couldnt hear anything distinct and the wiring we could see all seemed secure and unfrayed, on looking at the throttle body where the black plastic air intake slots on, its held in by 2 long bolts that attach it to the engine block.



On pushing and pulling the air intake the left side is solid but the right side bolt is just sitting in the hole, there is no nut or clip for it to screw into to tighten the intake to the throttle body, engine still runs fine when cold it gets a little stutter about every 10 to 15 seconds where it seems to slow down but then goes back to normal running.



could the loose airintake be a cause for kangaroo jumping and loss of power or is it just maybe a contributing factor in your opinion.



thanks in advance