Wondering if anyone has any thoughts on this problem with my '91 Grand Caravan 3.3L. Has 370,000 KM but still in pretty good shape and working reasonably well.
When going uphill at speeds of approx 80 KPH (approx 50 MPH) engine seems to "jerk" almost like a sputtering or missing ... but press the pedal to force a downshift and no more problem! Don't notice the problem when driving on level or at slower "in town" speeds.
Problem developed actually a couple months ago. A mechanic I normally trust suggested I get a motor vac done - referred me to a shop with the equipment to do it. Cost $100 and there's no noticable difference. In the last few weeks I've also noticed that on a cold start, there seems to be some hesitation (loss of power)when first starting to move. This disappears after a minute or so. I assume this may be related, although this is a recent occurrance.
Rod Corkum