hey guys i had a rough idle problem so i cleaned egr iac and maf and also throttle body so it was still rough then decided to change distributor cap and rotor and that fixed it for a day now i have a #4 cylinder misfire. What is my next move? oh yeah and i replaced plugs and wires about 3 weeks ago and put a new fuel filter on it.

 

Double check that the distributor cap is on squarely and firmly and that the plug wires are solidly connected at both ends. Sometimes air can get trapped inside the boot and keep you from having a solid connection.

 

it had barely a quarter tank of gas so i put enough to get over a half tank a let it sit all night and when i started it today it was hard to start but once it primed it fired reight up and is running good...what do you think maybe fuel pump?

 

Test the system:
96+ Fuel System Diagnosis

 

thanks for your help