the hose that is missing is about 3~4 cms long and goes on the underside of your throttle body. . looking back the other way its an anti pollution pipe that goes back to the charcoal cannister
next time cover the bubble with a dash mat :-)
jiffo is quite correct, the ecu plug bends like a banana, doesnt help when dopey auto electricians overtighten it and distorts it even more
you will need a complete 25de + computer+ afm etc. . available for under a grand, change the timing belt and water pump if the ks are unknown, add more $$$ for a qualified mechanis to do it for you
yep, the spray on caustic soda degreaser is the go, cleans off the real stubborn stuff, like most degreasers its best done while the engine is warm (not hot)
pf its good that you are thinking outside the box mate but for the$$$ that you are spending you are not going to get much bang for your buck~dont take this as being negative
take it as being realistic
there is a piston pin there that does wear out. . .all i can suggest is you take the lot to an engine reconditioner where they can run calipers over the worn/unworn parts and tell you if its still within tolerances and what parts you need to buy
no doubt the noise is low down but ive had the EXACT same problem on my auto 32 and the EXACT same buzzing sound and itcame from down near the trans, as soon as i had adjusted the tps it stopped