Engine stumbles on driving speed

Help my 89 civic DX it stumbles on driving speed, low speed or high speed. I have change ECU, spark plug, wire, Fuel Filter, roter and cap but nothing, it still stumble for about 5 sec. HELP..

hmm...for 30 bucks or so you can get a bosch 02 sensor. The fuel pump could be goin out to. check your battery connections and alternator output (i think like any local advanced auto will do this check for free if i recall). Hope that helps!

Check all the engine Earths, and the main earth on the battery.

And checking the ECU for codes would also be a good idea.

Well after 3 weeks I got my 89 civic back. My mechanic work on it first he thaw it was the distributor but no cigar had to spend more time in it neuron it to the main relay modulo. All right:bandit:

huh?