Lean and Rich

[Kirk_dsm]

Here is one that needs some major help. I have a problem with my engine. It has a rough idle and it seems like it isn't putting out as much as it could. I replaced the spark plugs the other week and looked at the plugs I was replacing. One of which was running lean and the other three were rich. I can't seem to figure out what is up with it. My mods are on my profile can anyone give some input on what could be the problem?

 

[GRAVEDIGGER]

Do you remember which one was looking lean? The number one cyl. usually is leaner than the other cyl. because of the way the air flows into the intake manifold and into the engine. If its cyl. number one (the one closest to the front of the motor, belts, etc.) then I really wouldn't worry about it. It's a good idea to replace your spark plug wires as well if you know it's been a while.

 

[Kirk_dsm]

Yup that would be the cylinder. I was told by someone else to replace the spark plug wires also. Just wanted to double check and get a second opinion. Thanks for the help.