Hello -
I encountred the exact problem with mine, and it's fixed now. so I hope it is going to be the same for you
I use to accelerate and at high revs it kind of cuts off like someone turns is it off and then on or it also feels like it needs gas...
Please take note whether the problem happens more if you are using lights/windshield wipers/stereo/heather...mine had that problem more often during night time when I had the lights on...
Mine is a 1993 Suzuki Sidekick, which means it's an electronic injection not a regular carburator
therefore it relays a lot on the electricity to run well. Mine had a bad alternator as soon as I changed it and changed the belt it was back to speed and it even gives a feeling like the engine is more powerful. because the alternator is giving enough juice!
The best way to go (free- no dollars) before you go crazy spending money and changing things and tinkering with the car: GO TO AUTOZONE (
www.autozone.com) THEY DO FREE CHARGING SYSTEM CHECK, THEY WILL CHECK YOUR ALTERNATOR, BATTERY, BELT EVERYTHING FOR FREE. YOU DONT HAVE TO BUY ANYTHING.
If it's not that then you can go and proceed with other options but this one is free and easy all you have to do is open the hood to the guy in front of the store -- THIS IS WHAT I DID.
Good luck to you !