i am in the final stretch of completing a 2.0L ABA bottom end swap (full rebuild) with a stock 1.8L top end. everything is back together and running. my problem is the idle is hunting once it warms up and if you rev it above 4k I get a bit of rattling/knocking.
the timing is good, double and triple checked, what are the possible causes?
1. CO pot adjustment needed?
2. dizzy problem? (currently running new aba modified dizzy)
3. too much vacuum forcing too much fuel pressure in rail ?
or something else?
my mechanic is scatching his head on this one. any feedback from those with pertinent experience is much appreciated