2.5L CEL issue

[outfit73]

Whats going on guys, so i have a 06 jetta 2.5l. I have done all the work on the car my self and after i put my ABD racing intake on the car it threw a CEL for p0171, of course that was 5 years ago when i slapped it on with the K&N oiled filter. so i had to smog my car here last month so the aftermarket intake came off and put the stock one back on with a brand new Bosch MAF because the other 1 was done for. Drove around for about 2k miles with the stock intake on, no problems ran just fine with my unitronic stage 1 flash, so about 700 miles ago i put the aftermarket intake back on with a new AEM dry filter hooked it all up no air leaks and the car ran like a champ until it wanted to throw a P0171 code once again. So i am lost here with ways to fix this annoying little issue, so is the last thing to do buy/make the MAF insert? Any input would help here.....

[itskohler]

Welcome to the 06-08 engine, haha.

There is a high probability it's your MAF. Clean your MAF, there are plenty of DIYs on the interwebs. If that doesn't work you might just have to buy a new one.

[outfit73]

The new MAF is clean and in working order, now i read a long time ago that putting in a MAF insert tricks it so it doesnt read that your car is taking in to much air and thats what my code is (running to lean)

[thygreyt]

The new MAF is clean and in working order, now i read a long time ago that putting in a MAF insert tricks it so it doesnt read that your car is taking in to much air and thats what my code is (running to lean)

my money is on the insert.

OR go with united motorsports' sw and they will have a file for you that takes care of the extra air... with extra fuel!