# Trouble with acceleration in the mountains **URL:** \ **Category:** Power/Fuel\ **Tags:** jetta, diesel, volkswagen\ **Created:** [May 1, 2011, 4:55am UTC](https://community.cartalk.com/t/trouble-with-acceleration-in-the-mountains/64285 "2011-05-01T04:55:12Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![slevno10](https://avatars.discourse-cdn.com/v4/letter/s/c68b51/32.png) [@slevno10](https://community.cartalk.com/u/slevno10)\ **Post date:** [May 1, 2011, 4:55am UTC](https://community.cartalk.com/t/trouble-with-acceleration-in-the-mountains/64285/1 "2011-05-01T04:55:12Z")
I have had power problems with my Jetta when driving into the mountains for the last 2 years. The first major repair I had done 2 years ago was to fix a fuel leak in the fuel injection pump. It seemed great driving around town for about six months. I took it to the shop again and this time they said the intake manifold needed to be cleaned. After that it seemed fine for another few months- then not. I took it in this time to the Volkswagon dealership. They found a hose that had a bad tear. That fixed the problem until I discovered a couple of weeks ago that once again I cannot go past 30 or 40 MPH up the hill. Can anyone tell me what the likely culprit is? Thanks ---
**Author:** ![oldschool](https://avatars.discourse-cdn.com/v4/letter/o/e19adc/32.png) [@oldschool](https://community.cartalk.com/u/oldschool)\ **Post date:** [May 1, 2011, 6:43am UTC](https://community.cartalk.com/t/trouble-with-acceleration-in-the-mountains/64285/2 "2011-05-01T06:43:54Z")
Not with the information you provide, but that repaired injection pump would get a serious look over if it was assigned to me. I would make sure the exhaust was not restricted also. There is a 5 page step-by-step guide about resolving poor throttle response issues that centers around some inital checks of fuel pump timing and the EGR system. ---
**Author:** ![ok4450](https://avatars.discourse-cdn.com/v4/letter/o/e9bcb4/32.png) [@ok4450](https://community.cartalk.com/u/ok4450)\ **Post date:** [May 1, 2011, 7:03am UTC](https://community.cartalk.com/t/trouble-with-acceleration-in-the-mountains/64285/3 "2011-05-01T07:03:33Z")
If not the exhaust being clogged or the injection pump being problematic then maybe the pump timing is off or the engine is getting weak. Maybe a compression test is in order just to make sure you’re not throwing money and time at a dying motor. ---
**Author:** ![Caddyman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/caddyman/32/23_2.png) [@Caddyman](https://community.cartalk.com/u/Caddyman)\ **Post date:** [May 1, 2011, 4:29pm UTC](https://community.cartalk.com/t/trouble-with-acceleration-in-the-mountains/64285/4 "2011-05-01T16:29:05Z")
Model year? Mileage?? ---
**Author:** ![Cougar](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/cougar/32/21348_2.png) [@Cougar](https://community.cartalk.com/u/Cougar)\ **Post date:** [May 1, 2011, 5:58pm UTC](https://community.cartalk.com/t/trouble-with-acceleration-in-the-mountains/64285/5 "2011-05-01T17:58:04Z")
There are a number of things the trouble could be. It could be as simple as a partially clogged fuel filter. ---
**Author:** ![oldschool](https://avatars.discourse-cdn.com/v4/letter/o/e19adc/32.png) [@oldschool](https://community.cartalk.com/u/oldschool)\ **Post date:** [May 1, 2011, 6:11pm UTC](https://community.cartalk.com/t/trouble-with-acceleration-in-the-mountains/64285/6 "2011-05-01T18:11:08Z")
That is why VW put out a 5 page step-by-step guide to resolving this issue. I cannot understand why people will not use the procedures outlined by the manufacture but will run to Goober under the shade tree for advice. ---
**Author:** ![chaissos](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/chaissos/32/2347_2.png) [@chaissos](https://community.cartalk.com/u/chaissos)\ **Post date:** [May 1, 2011, 6:16pm UTC](https://community.cartalk.com/t/trouble-with-acceleration-in-the-mountains/64285/7 "2011-05-01T18:16:36Z")
Follow this link and read more [Tech Tip: Poor Throttle Response on VW’s Diesel Engine](http://www.underhoodservice.com/Article/65652/Tech_Tip_P.aspx). There are lots more links out there. Do this [Google Search](http://www.google.com/#hl=en&sugexp=crnk_lssbd&xhr=t&q=VW+poor+throttle+response&cp=25&pf=p&sclient=psy&source=hp&aq=0v&aqi=&aql=f&oq=VW+poor+throttle+response&pbx=1&bav=on.2,or.r_gc.r_pw.&fp=822bf32b5c0e0691). ---
**Author:** ![oldschool](https://avatars.discourse-cdn.com/v4/letter/o/e19adc/32.png) [@oldschool](https://community.cartalk.com/u/oldschool)\ **Post date:** [May 1, 2011, 6:57pm UTC](https://community.cartalk.com/t/trouble-with-acceleration-in-the-mountains/64285/8 "2011-05-01T18:57:19Z")
That link is almost a direct copy of what is in the VW TSB, it does miss a few steps, like making sure the basics are right first.