2004 Dodge Truck O2 Sensors

If you can, try testing fuel pressure, it may be a little low. A clogged filter or fuel pump failure will cause this. A vacuum leak, or valve timing problem can also cause the symptoms your talking about. You can buy a real fine gauge for testing its pressure. Hope it helps you. There is a good explanation on o2 system requirements, these are necessary for engine performance and emission requirements, look under the 'site menu'. Ok? Hope it works out ok.