No cats! Still no "check engine" light!

[Gearhead91]

I have been running bassani mid-length headers, off-road x, magnaflow cat-back. I installed everything a month ago and I still have to check engine light! Is this normal? Something wrong? Any ideas? Thanks!

my car has:
MAC cold-air intake, ford racing 70mm TB, ported stock plenum, headers, x-pipe, magnaflow cat-back, stedda underdrives, and pro50 shifter.

 

[COramprat]

Nope...not normal. Is the light burnt out? DO you see it come on at start-up? If you do it will be a matter of time before it trips. Mine goes on and off with my Prochamber.

 

[Ruckus46Gt]

actually it is very possible. I've had my prochamber on my car for about 5k and still have never thrown a light or code(checked with my predator and no i never used my predator to turn off the light because i wanted to see how long it would take to trip the light)....the mustang shop that did my car said about 15-20 percent of mustangs will not throw a light

 

[Milenko]

Same here, but my X has only been on for a week. No sign of a light.

 

[Gearhead91]

interesting. Yup, my bulb is OK. Comes on when ignition is on. 15-20% of mustangs will never throw a light?! Damn, gotta love ford! Thanks guys.

 

[Ruckus46Gt]

most people just think it def is so buy the mils or whatever right away so they dont have to see the light.......i say buy them when they go on if they do

 

[GregGTStang]

It will come on. It can take months before it pops up.

 

[jas142]

Maybe your rear o2 sensors are just broken

 

[XtorT'r]

Same here, but my X has only been on for a week. No sign of a light.

After reseting mine, it can take a week or two for it to come back. just wait, figure about 50-350 miles.

 

[04ShadowGT]

My light came on like 3 miles after I first put it on (before I had the MILs and O2 extensions). lol