Bought a 98 RR 2.5 DSE about 2 months ago its going fine but hard to start when the engine is warm ?? This is causing the battery to run flat every two to three weeks. The Glow plug light comes on when starting the engine cold, but not when the engine is warm. Starts first time when the engine is cold. Im also having a deisel leak from time not always ?? Any comments would be appreciated.