Lately ever since winter began , Ive been having some loss of power going up slopes in my 89 blazer. I live in Calgary Alberta, and going west on stony trail from Deerfoot seems to be an issue.The moment i hit a slope my speed keeps dropping from 100 to 60. This used to happen during summer. During that time i used to downshift and that helped keep up the pace. When i downshift in winter i can hear the engine rev but there is still a delay in power getting to the rear wheels. At times i have to have the pedal to the ground to get some kind of speed. I have winter tires on .
Could someone give me some insight as to what could be the cause? What should i do to began testing.?
Vehicle spec Engine:4.3 L TBI V6 engine Transmission : 4 speed Automatic with Overdrive (4th gear is OD) Mileage: 180200 KM Parts Changed: distributor cap ,rotor and coil. new spark plugs
The previous owner stated that he did some work around the engine, didn't mention anything about rebuilding it.
Stony Trail is a highway in calgary , the section im talking about in the post has a lot of slopes. Deerfoot is just an another highway.