1990 Ford Bronco Q&A

1990 Ford Bronco Question: My Bronco rattles pretty bad everytime i step on the gas. what can it be?

every time i step on the gas it rattles pretty hard from im guessing under the motor. then whn i release the gas it runs smooth. -
Answer 1
SOUNDS LIKE TIMING IS TO FAR ADVANCED,HAVE THE TIMING SET WITH A LIGHT TO SPEC'S -
Answer 2
Does it rattle/shake in park giving it gas or is it doing it while driving? -