I have a 94 3.0 liter limited edition rude that iam having trouble with it staying idling. i fire it up and it idles for a few seconds and dies. it also back fires threw the exhaust while iam trying to start it. it will stay running if I raise the rpms up on the throttle but will die out as soon as i bring it back down to a idle. I just replaced the plugs and fuel filter on it so it cant be fouled plugs. the bulb seems to stay hard. any ideas ? thanks in advance.