While reversing into my drive the accelerator pedal briefly got stuck - luckily in the "up" position, not the "down" position, but given the hump in my drive that needs a little gas to get over, it still led to causing an embarrassing traffic hold up.
A little careful wiggling got it loose and got me into the driveway - but obviously, I'm more than a little concerned about it happening again in a more dangerous position.
Surprisingly, my Haynes manual has literally nothing about accelerator pedals (it has brake pedal maintenance, clutch pedal maintenance, and accelerator pedal position sensor maintenance, but nothing about the accelerator pedal itself). Searching online finds articles on what to do if I'm driving and the accelerator pedal gets stuck down (which will be helpful if I'm ever googling for answers while hurtling dangerously in an out of control vehicle...) but I can't find anything about diagnosing and fixing the underlying problem.
I imagine the solution will involve some oil or WD40 but I want to be thorough. What should I check and what should I look for? Is there any way to test the stickiness of an accelerator pedal beyond simply pushing it up and down with the car out of gear? How can I judge that an accelerator pedal is or isn't at risk of sticking?
Car is a Toyota RAV4 but it's too old (1997) to be affected by the notorious Toyota sticking acceleration problem.
Mechanics in this country tend to be rather gung-ho about risks and often take an attitude of "well it works now, it'll be fine", so while I do intend on having it looked at, I want to be able to understand what's going on and do what I can myself, too.