i have a 1993 honda del sol s its an automatic with a d15b7 it starts to buck at 1500 rpms and it happens while driving and while in park i already replaced the throttle body complete with tha tps and i change the iacv and fuel filter and still tha same problem the car is completly stock my check engine light is on also it started happening about two months please help any idea what it could be?

 

what code are you getting?

 

Have you checked into timing?

 

define "buck" and only at 1500 rpm? is it continuous? Any recent work done on car?

 

i havnt checked into timing and a shaking like a rattle and no it stops after 1500 rpm and just wats listed

 

Spark plug wires shorting out or broken in the valve cover?
Rotor/distributor cap bad ?

Pull spark plugs and check color.

 

two of them where blue