4A-GE 20v Silvertop low idle prob.

[AlexFourTwenty]

So I’m a new member, I have a AE85 coupé with a 4age 20v silvertop transplant. Currently having some troubles with idling. It will drop so low it starts to lope and sometimes it stalls. Can this be a vac. leak or could it be carbon build up on my itb’s. Its pretty much stock, Just running straight pipe. Also I would like to add i believe it’s running rich because the gassy smell is horrendous. Makes my eyes burn if I’m not going at decent speed lol