[Shotimes] 93 SHO Failed Texas State Inspection

[Chris Mayfield]

High NOx is typically indicative of a lean mixture. How old are your
oxygen sensors?

The fuel pump will not cause this - the 155 is a perfectly acceptable
stock replacement and will not cause any running or driveability
issues.

Chris

On Apr 9, 2005 10:21 AM, Anthony del Busto <dbusto@earthlink.net> wrote:
> I took my 93 in for the state inpection and couldn't believe that it failed.
> It failed the Nox(ppm) on both the high (25mph) and low (15mph) speed
> emission results.  Am I correct to assume that the engine is not burning the
> fueling efficiently?  Back in October I replaced the original fuel pump with
> a new 155 ltr/hr fuel pump.  Could this be the culprit?  Should I intall
> check the fuel pressure and install a fuel regulator if pressure too high?
> New wires and plugs (all Ford OEM) recently installed as well.  Please
> advise.
>
> Tony
> 93 mtx (stock)
> 110k
> _______________________________________________
> Shotimes mailing list
> Shotimes@autox.team.net
> http://www.team.net/mailman/listinfo/shotimes