My 1994 Camaro, 150k miles, will bog and sputter after the first hard acceleration after start up and continue to do so under any load in 5th and 6th gear and still kinda does in 4th. I have replaced the plugs, fuel pump/filter/, and cleaned the air filter but to no avail. Runs worse off 87 octane but still does the same on 89/93 just not as quickly. I was thinking injectors? or maybe bad coil? idk thats why im asking you. I havent been to advance to hook up the ecu and see the codes as it does have the CEL on.

 

Need to scan the cel first. But MAF cleaner wouldn't hurt either.

 

check the intake that nothings loose mine would do the same thing.