Installed Steeda UD Pulleys and Misfired?

[DawgStang]

The day after I put the pulleys on I started showing codes that indicate misfires in cylinders 3, 4 and 5. Cleared the comp, no probs for a day. Then it shows up again. No stuttering, no weird noises, nothing. Drives silky smooth and accelerates fine.

Pretty sure the car has had the original plugs for all of my 105k miles. Changing them out tomorrow, but wondering if you have any ideas if that does not work...

Thanks in advance.

 

[gotchopsticks]

if the plugs dont work then, if you can, swap the pulleys back and see if that takes care of it, isolate the problem ya know? and when doing the plugs make sure you do some research on the torque specs and procedure...i did it wrong once and blew a plug out of my head

 

[DawgStang]

Ouch! Heard they break off in a big way, too...

 

[DawgStang]

Figured it out. Total rookie move. Let's just say this:

Read the installation directions.

I didn't torque the crankshaft pulley bolt properly.