i got my intake, headers, n plenum spacer put in about 4 months ago. and ive been getting 14 to 15 miles to the gallon 16 the most if i dont punch it at all. And the SES light wouldnt go off. It goes off n then turns back on. just wanted to find if that was normal.

 

do u have test pipe

 

What kind of headers???

 

no i dont have test pipes and i got strup headers and skunk2 plenum spacer

 

02 sensor??

 

Why do people feel it is okay to ignore the SES light?! It comes on for a reason, find out what it is. You can take it and have the code scanned and find out why the computer is throwing the light. Incidentally, that may be why your mileage is in the toilet. When that little light comes on the car will go into "limp mode" which makes it run pig rich to protect the engine.

 

Try an ecu reset....if the light comes back, you need a scan to see what triggers the light.
C.