i went to emissions testing not to long ago and i just barley passed. i had my stock h-pipe with 4 cats an a flowmaster american thunder cat back with the 40 series mufflers and tail pipes that turn into 3 inch after the axle. also my engine is bone stock. the guy said i had alot of unburnt fuel coming out of my exhaust. could this mean i need new 02 sensors? my gas mileage does kinda seem kinda crappy for stock engine but i dont really know for sure. also my car just hit 80k miles yesterday. let me know what you think. thanks
might need new 02 sensors but dont know. HELP
- Thread starter cb18201
- Start date
maybe
It could be the case, or could be a couple other things as well. Have you checked your computer for codes yet?
My car was running pig rich, but I was getting lean codes so I decided to replace the 02's. Still got the lean codes but wasn't running as rich. Cleaned the MAF and viola! No more codes and the car runs great. That could give you a place to start anyway.
JW
It could be the case, or could be a couple other things as well. Have you checked your computer for codes yet?
My car was running pig rich, but I was getting lean codes so I decided to replace the 02's. Still got the lean codes but wasn't running as rich. Cleaned the MAF and viola! No more codes and the car runs great. That could give you a place to start anyway.
JW
stang_gt_1994
Founding Member
Take it out of the housing, take the black electrical piece off using a torx bit, clean the two wires with a Q tip that has rubbing alcohol on it.
donkey_punch
New Member
when was the last time you change the O2 sensors?
last time you changes the plugs, wires?
maybe, your cats might be bad.
last time you changes the plugs, wires?
maybe, your cats might be bad.
adam302gt
New Member
you said you had your stock h-pipe with 4 cats? i thought we only had 2. if you decide to clean the MAF make sure you are VERY careful and do not break one of the 2 little wires, or else it will me time for a new one.
