Land Rover Repair: 1998 discovery problem, crank sensor, sticky valves

Question
Why does my Discovery slow down while driving?  It would not go over 20-30 mph even if the gas pedal is down to the floor.  Only the RPM increases when I apply gas. After a while it bucks %26 starts driving normal.  Can you tell me if it is the transmission? It was in the shop last year for months trying to correct the problem.  I have had the fuel filter replace after the fuel pump failed. So, here is all that have been replaced: fuel pump %26 tank, fuel filter,PS, ECU,%26 in the process of replacing the crank sensor...please help!

Answer
There's an article on sticky valves on my main website that may explain your problem.  Go to www.robisonservice.com > service > land rover > advice and you'll find it.  There are many possibilities but this is one you may not have thought of, that's common on Rovers of that vintage


Good luck
John Elder Robison
Check out my car blog at http://robisonservice.blogspot.com and my articles at www.robisonservice.com