2.8 30valve erratic rpms

[dennis greger]

I just replaced the timing belt on my 99 A4 2.8.  It idles fine, but slow, and runs fine at high rpms.  However, between 1400 and 2200 rpms the engines rpms are erratic, simlilar to the way an electronic rpm limiter would affect it.  It runs fine for approx 1-2 secs and then cuts out for approx 1-2 secs.  Yes, I am 100% confident that the belt was properly installed as I have done several of them .  Any ideas?Get more from the Web.  FREE MSN Explorer download : http://explorer.msn.com