sticking acelleator

Hello, Dave here, contributing to RepairPal and providing expert advice since 2010. I am afraid I do not know what is meant by "accelerator sticking" while braking? If you are braking, why are you attempting to accelerate? Are you saying the engine speed increases when braking, on its own? Keep in mind that power brake assist function is created using a power brake booster that utilizes engine vacuum to operate. If there is an engine vacuum issue, it could affect engine speed as well as braking power. This is the only clue I have. I'd recommend something so sensitive and a safety issue be evaluated by a professional techniican near you. https://repairpal.com/auto-repair-near-me Click the link or call us at 877-913-1554. We'll gladly find you a certified RepairPal shop in your area.