. Pop the hood and look for a loose vacuum line, spark plug wire, injector plug, etc.
Purchase a scanner. It's 20 dollars that no mustang owner can do without. Until then @jrichker Has a sticky that shows how to do it with a paperclip and count the flashes on the check engine light.
Purchase a scanner. It's 20 dollars that no mustang owner can do without. Until then @jrichker Has a sticky that shows how to do it with a paperclip and count the flashes on the check engine light.