I installed a k&n intake on my car, 2 days after I installed it my CEL came on. But after about a day or so it will turn off, then back on again. So I checked everything over and retightened everything, and double checked to make sure there was no leaks, but the CEL light still came on, then turned off, then on again. Anybody have any idea what's going on??

 

Try disconnecting the battery for about an hour, re sets the computer.

 

did you re oil the preoiled filter? if so you've probably soaked the maf in oil.

Check all your vac lines, if ones cracked that can cause problems, check the rubber boots after the maf, if one of those are racked it can cause problems.