Engine wont rev

My 2003 Mazda Tribute is shaking and it seems to have lost some power. It first happen when my vehicle was loaded pretty heavy and I started going up on a steep highway. What could it be?

Engine Performance problem
2001 Mazda Tribute 4 cyl Two Wheel Drive Manual 10500 miles

Strange situation - Loss of power upon acceleration and then runs fine. In running around town seems every other stop light it either is running and missing at idle with no power at acceleration or the next stop light takes off like nothing is wrong. Runs fine on the interstate at high speed (55 75mph- only thing I did was fill my tank they night before - bad gas? Any ideas?

Hi about a week ago I asked you about my 2001 mazda tribute bogging on me and when it did the security light would flash, you told me to put it on the analyzer I did at the ford garage, it is still only showing the h20 sensor nothing else, at the time the car when not driven for a day or so is ok until it gets warmed up then it acts up again !

Also when the car is warmed up you can start it but when you put it in drive it shuts off!

The engine was scanned the only thing that came up was o2 censer!

Hi I recently have been asking you a series of questions about why my 2001 mazda tribute bogs out and the security light comes on, well I have had it at the garage at Penny Mazda, and they seem to think that its a break in a wire but don't know with one !

Ok the mechanics say it has nothing to do with the security system ! I dunno and 104 buck an hour ticking away its not good on the pocket book ;(

For a couple of weeks the car would be dead occasionally when going out to start it. But some days it would start right up. Then one day the car started losing radio and power windows and locks going down the road. After we pulled over and cut the car off we had absolutely no power. Jumped it off and turned nothing extra on so we could make it home. Tested power going to alternator and it was low so I Pulled alternator and had it tested at auto zone and it failed. Installed new alternator and upon cranking got zero power to the alternator so I took it back off and had it checked at auto zone and it passed. So I'm at a loss for what it could be now?

Figured out that the parts place had sold me the Wrong alternator and after getting the correct one it's working fine.

I was driving approx. 50 km when looked down and all of the gauges just stopped and went to 0, the car started losing power no indicator lights came on prior to the car dying. It wouldn't start again then got a boost it started wouldn't keep a charge, changed the battery. Drove for about 1.45 hours then it died again. Not sure if it's the alternator as no lights indicated it was the alternator

146, 00 km