I am having issues diagnosing this problem. It's a 99 Durango w/ 5.9L and it is misfiring and flooding really bad. I've used half a tank of gas in 30 miles. I have changed everything spark related except the coil. The only sensor I haven't changed is the tps, iac, and temp sensor. Any ideas as to what might be causing this problem?

 

Is the service engine light on? If so get the codes for us.

 

I'm not sure what the problem code is for it at the moment but it was throwing a code for the o2 sensors.

 

Get the codes read if the CEL is on, then fix those issues. The code will tell you whats wrong. You also did not mention if you have done a full tune up (plugs, wires). Might add that to the list after you get the CEL corrected.

 

Jkeaton, if you will notice in the last two posts it says I changed everything spark related, aka tune up. It also says that I have read the codes from the cel and it says o2 sensors. Thanks for your input though.

Just to clarify I have done a full tune up including cap and rotor.

 

My apologies for not fully understanding. Good luck.

 

As of right now there is no CEL or problem codes. But, still having the same issue.

 

Did you replace the O2 sensors or just reset the code? Bad O2 sensors will destroy gas mileage. I had a cavalier that cut its gas mileage in half from bad O2 sensors.

 

Replaced them. Still having same issue though. Still no CEL.