The throttle body can accumulate carbon deposits causing the throttle to stick or pop when first accelerating after the vehicle sits for a while. Performing a throttle body service will generally correct this problem.Google+
Car Problem Reports
Honda Accord Carbon Deposits on Throttle Plates Can Cause Throttle to Stick on Acceleration
Honda Accord Problem
Average Mileage: 113,250 mi (70,000 mi - 163,000 mi)
Visitor, 1998 Honda Accord, 163,000 mi
everytime my car sits for more than a couple of hours and i go to start and accelerate it sticks at first..
If the car sits overnight, the throttle cable gets sticky. I've mentioned this on 2 visits to the dealership for repairs. Their only response was to lube it. (How can the "lube" a metal cable that is covered? I can lube the visible parts myself.) Seems like the cable should be replaced.
Visitor, 2000 Honda Accord, 120,000 mi
I first noticed the sticking around 25kmi. When I went in for my 3kmi tune-up, the dealership asked me about the sticking before I could say anything. They recommended a throttle body clean and it worked well for another 30kmi. I can't remember how much they charged me but I do get it done somewhere else now that I'm out of warranty.
Visitor, 1999 Honda Accord, 70,000 mi
We purchased the vehicle from Honda Cars of Bellevue and a week after purchasing the accelerator would stick and hesitate when beign pushed down. The dealership stated the throttle body cable needed cleaning for a cost of $75. Why they didn't volunteer to do the repair free of charge, I don't know. However, I do know I had the throttle cable cleaned at a different shop for about $30.