Trouble with acceleration in the mountains

diesel
jetta
volkswagen

#1

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


#2

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.


#3

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.


#4

Model year? Mileage??


#5

There are a number of things the trouble could be. It could be as simple as a partially clogged fuel filter.


#6

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.


#7

Follow this link and read more Tech Tip: Poor Throttle Response on VW’s Diesel Engine.

There are lots more links out there. Do this Google Search.


#8

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.