Trying to fix my gf 98 civic ex. Tues morning she started it to warm it up. Went back out to leave, car quit n wouldn't start. It has spark at all four cylinders. Has fuel, put new set of plugs in. It runs when you start it but as soon as you tap the gas it dies. Need to get this thing going. Just started it again, if i hold the gas about half way it accelerates, but once i let of it like bogs down.Any ideas what it could be? Could it have jumped timing? Has a check engine light for O2 sensor