Hey guys,

I've noticed recently that my car is idling slightly rough. At approximately 800 rmp (just above idle), it gets more rough, then it smooths out above 900 rpm. I have a K&N drop-in filter and I use AMSOIL. Other than that, the car is stock.

The nipple on my intake piping has been broken for a few weeks. I still need to take it in and get it fixed, but I have the line taped in place for now. It seems better now that I have taped the vacuum line, but it's still not right. Any ideas? Thanks guys....

 

Vacuum leak at the cracked fitting allowing in unmetered air. Skews the fuel trims.

 

^ yep had the same thing when i installed my dejon intake like over a year ago. Finally ghetto rigged a fitting to go on the intake and the problem is gone. I strongly recommend you get that line back on

otherwise:
knock knock
who's there?
not your engine