Hesitation when accelerating from a stop???

[csrwsc3]

My question is what would cause the hesitation from a stop when first starting out? Its like something is slipping and then catches & then it goes fine? Only happens when you first accelerate from a complete stop. When you get to 20+ or so mph it runs out fine. I just changed the timing belt & all other belts at the same time, about 2 weeks ago. Any info would be greatly appreciated. Thanks.
Craig

[Toysrme]

Bad cam timing. Vacuum leak. Slipping transmission.
Check your transmission fluid first. You drive a slipping automatic transmission at all and you'll burn it's clutches out & then you're stuck witha nasty repair bill.

[ifidie2nite]

Originally Posted by Toysrme

Bad cam timing. Vacuum leak. Slipping transmission.
Check your transmission fluid first. You drive a slipping automatic transmission at all and you'll burn it's clutches out & then you're stuck witha nasty repair bill.

I think I have something like the slipping transmission. It's only when I first turn the car on though, it takes it a little while to click into gear after I shift.

But to answer the first guy, does it shimmy during hesitation? If so I'd put injector cleaner in first. Repairs are last resort.

[csrwsc3]

Me again with the hesitation problem. I took the timing belt off & am going to tackle it again this evening. I downloaded the 93 fsm from here, awesome! I need to know which installation mark to align with the drilled mark of the crankshaft timimg pulley. There are a few green marks on the belt, some single lines & some double lines , plus a line of arrows. Which one goes with the drilled mark to start out with? Thanks for the help.

[WillieBruce]

My 2003 ES330 will sometimes hesitate when you press the gas at city speeds 20-45 mph. Most of the time the car will "pause" a second before accelerating in response to the gas petal.
Any help?