I HAVE A 1990 240 DL WITH OVER 300,000 MILES ON IT, ITS SLOW GOING UP A HILL on 1990 Volvo 240

WHEN GOING UP A HILL ITS SLOW AND HAS TO BUILT UP SPEED, WHAT COULD BE THE CAUSE

3 answers
could be fuel,exhaust blockage or many other issues. seek diag and est
Agree with Greg's....I'm leaning toward exhaust blockage. Have cat. converter checked.
Had any work done on it lately? Maybe timing belt replaced?