IACV cleaning instrustion...(Mods please sticky this thread.REALLY a common problem for GA16DE.)
http://www.nissanforums.com/b13-91-9...-pictures.html
The idler pulley is for tightening up the belt.As I remember it's the pulley next to the water pump,looking toward the engine front.It's a common problem for squeaky belt.
I have no experience with timing chain jumped.But I have read people that they advance the timing all the way,but still have detonation.The car will run very badly.It's unlikely to happen.If it does,switch another used engine will be a cheaper fix...
I think I got what you meant.Yes it's normal everything went dim when the car is CRANKING...if the alternator check out good,I suspect it's either the ignition switch which IanH suggested,or the clutch switch.
Addition to tune up list: air filter, pcv valve,transmission oil---only use GL-4 or synthetic oil,you need to change the oil every 30,000 miles to avoid losing the 5th gear.
Before you put in another distributor,get a new o-ring for it to prevent oil leaking inside,and set the timing at 10 degree after.