Will this work with X-pipe?

[DW5.0L]

I removed my stock H pipe. Putting on an X pipe in its place. Can I use the HELP anti-fouler plug trick with the O2's and not get a CEL? If not, what do you need to eliminate the CEL? Thanks.

 

[Mustang30240]

exhaust on 5.0's doesnt make the cel come on...

 

[DW5.0L]

Even if you remove the cats? Won't the computer throw a CEL without them? I hope that you are right. I used the antifouler on another car when I went to an off road downpipe without cats.

 

[TheUser]

Eliminating cats won't throw a check engine light on OBDI systems (I believe pre '96 computer systems) because there is no way for it to know. If you don't put the O2 sensors back in, you'd get the check engine light. On ODBII cars (I think 96 and later - what your other car probably was), there is an O2 before and after each cat, so it can detect a missing cat, so it would throw the check engine light.

I have a 90 and 91 both w/o cats and neither have a check engine light.

 

[BlownFiveLiter]

TheUser is correct. Mustangs up until '95 have no downstream O2 sensors, except for the '94+ V6. The V8 Mustangs got OBDII in '96.