hesitating

Car is a 1995 Buick park avenue Ultra Series I L67 Supercharged and 4T60E transmission. The issue is jerking, back and forward like you are being shaken, and not being able to go past 3500 rpm. Car drives fine if you don't step on the gas and if you disconnect the battery and re- connect it...

I have had an issue with as long as I've owned my Riviera, whenever I go to accelerate onto the highway or from a relatively low speed to a higher speed, it seems like my engine bogs down. If I floor it, my engine revs up but it seems to lose speed instead of gaining it. And if i let back off...

Hi. I have a 2000 Buick LeSabre Custom with the GM 3800 series II engine. It's got 245k miles and it's been stalling, sputtering, hesitating, and unwilling to start at seemingly random intervals. And, such is my luck, there have been no Check Engine light at any point during this saga...