i have a 92 HB with d16z6 and the power seems to be on and off.
when the car has been running for about 1/2 hour, the power surges slightly.
it feels like the car wants to accelerate then suddenly it "kicks" on to normal power.
this normally happens when accelerating around 2000 and up with moderate throttle.
sometimes its fine and a minute later it just feels weak then it "kicks" back to normal suddenly.

any help is greatly appreciated.
thank you

 

check plugs and wires plus distributor. if that isnt it then try injectors