i got a 1994 celica st. had a 7afe 1.8....it blew and and i got a 1.8 7afe from a corolla but the corrolla had no erg.... anyway.. its been running good for 2 years.. last week i get a misfire.

I replaced Cap, rotor, wires, plugs.

I get the misfire but only at stoplights. and only at idle or take off.....

at 1,500RPMs, and ABOVE, THERE IS NO MISFIRE.

any input would help