running rich

[SHOman247]

ok what could be causing my sho to run rich. You can smell gas really bad out the tail pipe when at idle and in the car when i rev it up. Plus lately i have gotten some pretty crappy gas mileage. So what might be causing it to run rich and how can i fix it? I have no leaks that i can find. anyone else have this problem?

 

[AutoSHO]

Bad MAF and/or Oxygen Sensors

Check Codes.

 

[SHOman247]

i haven't had a CE light come on yet but i will be doing scan of stored codes this weekend. would a KOER test detect that?

 

[AutoSHO]

Possibly, but it may not depending on how bad the Oxygen sensor is. Sometimes they get lazy but wont throw a code.

 

[Mr Anonymous]

Where's your temp gauge reading? If the car isn't warming sufficiently due to a stuck-open t-stat, your car will remain in open-loop, full-rich mode. A failing ECT sensor may also be the culprit. First start by reading your codes.

 

[SHOman247]

95% of the time it stays at 195 range but once in a great while it will climb to 210 and stay there then go back to 195 and this is not b/c the fan kicks on or anything

 

[AutoSHO]

Do you ever have any trouble starting? Does the fan come on when its supposed to?

 

[SHOman247]

nope and yes...i have a fuel pressure gauge and it's always were it supposed to be in terms of fuel pressure

 

[AutoSHO]

In that case, I would probably clean the MAF if you havent already (electrical contact cleaner, any auto Parts store) and replace the oxygen sensors (autozone, $38.99 each for the Bosch).