D15Z. Just replaced entire ignition system, replaced O2 sensor like the code threw, and i am still getting really bad and inconsitant Misfires and random engine dyings. Cat is hollowed, stock motor to bs muffler. WOuld the motor need that backpressure back since the Z is already low comp or wouold it be fuel sytem like i hope it is. Anything would be helpful
Ben

 

change your distributor cap and rotor, spark plugs, and wires, and see what that does for you. Or it could be something as easy as your spark plug wires not being correct on the distributor cap.

 

make sure that you got the right firing order.

 

did it misfire before you changed everything? if yes then check compression, if no then do what the guy said above and check firing order.

 

Well see its very inconsistant. It cannot be firing order, cuz she raan great all day till i came home. On the way home, it would bog and not fire at all, then misfire and like fall on her face, miss like it ws running on maybe 2 cylinders then itll run okay. Where can i get my comp checked?

 

Anyone?