I don't think he said he had a CEL on?

 

If you are saying they are unable to read the cars computer with their scanner, a fuse for the OBD port could be blown. I have run across this at my shop more than a few times.

 

lol.. didn't know that part..

 

You sure can hook them up backwards but it seems it would cause a rich condition not lean. The sensors are the same but the right harness has to be hooked the the right sensor and same for he left or the ecm will be confused.

Copied from Brenspeed


Front 02 Sensor Harness Location


One of the biggest mistakes after removing the front 02 sensors on a 05 and newer mustang is re-installing the wiring harness incorrectly. The result is an overly rich condition along with poor idle and part throttle acceleration. We receive calls for this after turbo installs, exhaust installs, clutch installs, and any other time a customer removes the front 02 harness. Ford has located your 02 harness in a location that makes it very easy to mistake the left for the right and vise versa. When you do this the computer will try to compensate the wrong bank of the engine for a 02 signal from the opposite bank. Not only will this make the car drive very terrible but it can make part throttle acceleration at times impossible.

Solution? Check out the image to the right to view the correct factory Ford routing of the 02 harness. You MUST use this routing or your engine will not run correctly. This is the first thing we have customers check after they have removed the front 02 sensors and then reinstalled them to find part throttle and idle engine issues. We have had cars shipped to us from as far as 12 hours away to find out this was what was causing all their troubles after they installed long tube headers. Take the time to confirm you wire the front 02's correctly and GOOD LUCK!

 

Wow, thats interesting. Thanks. Been a while since I installed my or/h havent been under there in a while.

 

I just installed the emissions tune today. How long should I drive around before attempting to get my rejection sticker fixed?

 

I just went to emissions and since I had swapped tunes the day before, they couldn't test my car. They said to drive the car normally for 10-14 days and come back.

So I am driving on the stock tune and it feels like I am towing a @#&! trailer around.

 

Last year I switched back to the stock tune, but with the Steeda intake, I got a engine light. I ended up putting the stock intake back on just to get the sticker.

This year I'm hoping the emissions tune will do the trick. Rejection paper work says I have 60 days to fix the problem, so I can easily put on 50+ miles before I try to pass again.

 

yea had the same problem. computer not ready to read emmisions data. put the stock tune & intake on drove it a few days. it passed today