running super rich

[brwntom]

I have a 98 ranger, 2wd 4cyl. This last tank of gas went by in only 200 miles vs the average of like 280 miles. There is excessive soot around my tale pipe. I think its running really rich. No check engine light on. What could it be?

Tom

 

[adsm08]

When were the plugs and wires changed last?

 

[brwntom]

about 50,000 miles ago.

 

[70roadrunner]

air filter?

 

[Sasquatch_Ryda]

Hows about the thermostat?

 

[brwntom]

filter was good at my last oil change. I noticed just now that there is a slight miss at idle. It runs at proper operating temp.

 

[adsm08]

I'd tune it up and hit it with a new oxygen sensor to start.

 

[DangerRanger94XLT]

try cleaning the MAF and to clean an oxy censor you use heat like a propane torch or something if that doesnt work buy a new oxygen sensor.

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1994 Ford Ranger 2 tone Medium Opal Metallic Clearcoat &Dark Lapis Metallic 4x4 XLT reg cab long box