View Full Version : Hesitation between 3000 to 4000 RPM

03-25-2008, 06:42 PM
Just wanted to get everyones thoughts on this.. I have a 01 1.8T. I'm getting some hesitation between 3000 and 4000 rpms. It feels like I'm losing boost or something. Someone had said it might be a valve on turbo?? Any ideas?

03-25-2008, 07:48 PM
Could have something to do with the vvt. 2001 was the first year audi put vvt in the a4. There is supposedly a faulty code in the bosch ecu. The ecu tries to take in too much info and "hiccups" at a certain point. I have an '01 and experience this same problem. Haven't found a fix for it yet.

If it feels like your losing boost, i would get yourself a nice boost gauge and monitor boost levels. they are very helpful in all turbo cars.

03-25-2008, 10:48 PM
if its not a turbo related issue, my buddys Maxima had the same exact problem and the issue was the MAF. just needed a new one due to the other being no good.

03-25-2008, 11:03 PM
I had similar hesitation on my old 626 and it was MAF related. Clean the MAF as your first step.

03-27-2008, 06:28 PM
Ill clean it this weekend and let you all know.

08-01-2008, 08:37 AM
Been a bit, but I pulled the MAF and cleaned it, then cleared the p0171 code. The car ran better then it has in awhile..... for like two days and then trouble code appears and I say bye bye to my boost. Would this Code be from MAF and thus affect Boost?

08-01-2008, 09:15 AM
yes the maf will affect boost. It looks like you should try and replace the maf. Cleaning it doens't always fix the problem. The elements could be burnt out.