Intermittent bucking, stumble...

[90CivicDXHB]

Hello:

I have a '90 Civic DX hatchback with a 1.5L "dual point" motor and 147k miles on the clock. It has generally been running fine execept for Monday night on the way home from work. I had driven about 20 miles and was doing about 75 mph in the high speed lane of the interstate. I went to accelerate in 5th gear with the A/C on and all of a sudden, the engine bucked, sputtered and hesitated. I let off the throttle, and the engine ran normally. So, I merged over into the low speed lane and tried to accelerate again. At full throttle, the buck and surging reoccured. When I got off the exit ramp. the car idled normally, and when I ran it through the gears, it seemed to perform fine.

I took it to the Honda dealer today, and of course, they couldn't find anything wrong with it. In the last two years, I've put plugs, wires, rotor, rotor cap, fuel filter, air filter, O2 sensor and fuel pump relay on. Sometimes the motor will thow a check engine light. The dealer today said that the ECU didn't store the code. Several months earlier I took it in to have the throttle cable adjusted, and the dealer said the ECU stored the code "mixture not rich enough during warm-up". He said the throttle cable was causing the code (which I didn't believe)

Any thoughts, ideas, opinions, or suggestions? Thanks in advance!

[civicHBsi91]

try fuel injector cleaner they might be cloged or sumthing, and on some cars there are 2 fuel filters one is near the back left tire somewhere ive seen them on some cars but i dunno if 4g's have them