Hot Start Kit. Also known as the PPR O ring or O rings.
The accumulator is the main culprit for not starting when engine is warm or hot. But if it doesn't start properly after you install a new accumulator then this may be the problem.
The Hot Start Kit goes in the distributor - in the primary pressure regulator in fuel distributor
If the small O Ring on the end is cracked, broken or a notch out of it, depending how bad the O Ring is is going to determine how fast the hot start will be.
This part appears in the following categories:
PartsFuel and EmissionKitsNot Starting When Hot