greenbastard

The engine cranks and turns over fine .. even idels good... after about 15- 30 seconds of running it starts to choke itself it seems like . .. but it only drops about 200 rpms when it does this and also it back fires ... I have the air filter off and ive been just pissen around checkin stuff and it seems when I barelly cover the intake throttle it dies completly... could this be a problem with the intake or o2 sensor....