# Breathing Problem **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [May 10, 2012, 5:06am UTC](https://community.cartalk.com/t/breathing-problem/72345 "2012-05-10T05:06:33Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Legs](https://avatars.discourse-cdn.com/v4/letter/l/a87d85/32.png) [@Legs](https://community.cartalk.com/u/Legs)\ **Post date:** [May 10, 2012, 5:06am UTC](https://community.cartalk.com/t/breathing-problem/72345/1 "2012-05-10T05:06:33Z")
'00 New Beetle TDI, drops speed on highway when long incline hill from 65-70 to sometimes 50! Uh, and that’s with my husband (247#) too. Local driving, just me, going up my Southern Tier of NYS steep country hills will drop from 55 to 30. Have done diesel additives religiously since injector replacement ($$$$$). Timing belt new in '06. Recent work done was replacing a relay (awesome mechanic) and tensioner assembly & idler pulley, they went and aren’t considered part of the problem. Though what do I know . . . our super foreign car guy retired! ---
**Author:** ![GSragtop](https://avatars.discourse-cdn.com/v4/letter/g/7c8e57/32.png) [@GSragtop](https://community.cartalk.com/u/GSragtop)\ **Post date:** [May 10, 2012, 6:08am UTC](https://community.cartalk.com/t/breathing-problem/72345/2 "2012-05-10T06:08:13Z")
Common issue #1 clogged snow Screen. Type in YouTube and you will see what I mean Common issue #2 MAF Sensor. Very common on that vintage TDI. Ps the one for a 1.8t motor is basically the same and much less money last I checked. Common issue #3 carbon clogged intake manifold, if this is the case it needs to be replaced. Try #1 and two first