Emissions Inspection Tips

Emissions Inspection Tips - For any Mustang enthusiast, with HP generating mods, inspection time might make you a little nervous. Of course, to be friendly with the environment should be one of the goals when creating a Street Legal car

For any Mustang enthusiast, with HP generating mods, inspection time might make you a little nervous. Of course, to be friendly with the environment should be one of the goals when creating a Street Legal car. I've put together some check points, based on my experience, before taking your car to inspection. Please use this as a guideline rather than a sure bet stuff. This guide may not be useful if the inspection is done on a dyno (many states are starting to do this.)

  • The Easy Ones: Visual check of working wipers, all lights, tires, fluid levels and make sure the horn and brakes work. :)
  • Tune Up: Check your plugs, distributor caps/rotors, ignition wires, air cleaners, PCV, O2 Sensors & change Oil.
  • CATS: If your car doesn't have any cats, put them back on. CATS are required. Keep your car off the public road without them. :)
  • Timing: Bring the timing down to 8-10 degrees.
  • Gas: Don't put the premium gas. Make sure, that your car is almost empty and put 2 gallons of regular gas. If you have also changed Fuel Pressure, bring it down. Leaner the better.
  • Temperature: Make sure that the engine is warm and in the regular operating temperature, and that the cats are heated up. Keep the car running as much as possible, higher than idle to keep everything warmed up, especially the CATS. If your car is equipped with an electric fan, and you do have a switch to turn it off, do so, and warm up the car.
  • Idle: Set the idle as high as permissible, especially if you do have a cam that's a little wild.
  • Cross your fingers and wait for the result.
  • Now, if the above didn't help, try taking the spout out before having the car inspected. With the spout out, the car will run like CR@P, but the A/F mixture will be lean..... hopefully lean enough to bring the measurements down!!


You may also be interested in . . .

  • Back in May of 97, after all the long hours spent researching what I should do to my car, I decided on getting a S-Trim for myself.

  • You have probably noticed some wires and a plug hanging loose by now. You can either find a way to make the neutral safety switch work, or you can do what I did.

  • First things first. You'll need a few things: a timing light, a distributor wrench or a ratchet and socket that will fit the distributor hold down bolt, and a little know how.

  • When I first bought my 'Stang I always had problems with the idle. No matter what I did it always went up and down, up and down, up....uh, you get the point. After performing a full tune up, which included changing the spark plugs, plug wires, fuel filter, air filter (k&n), cap, rotor, and setting the timing and tps voltage I was disappointed to find that the car still had a lousy idle. So what's next? Try changing the idle air bypass solenoid (IAB)? I was about to, until I noticed that the throttle plate in the Throttle body was so dirty that you could barely see the edges of the plate.

  • Chip is perhaps one of the most talked about tuning in the EEC based Mustangs. And yes I had a chip on my setup and here's what I think of it.

  • Upgrading the TB is one of the popular mods that any Cobra owner will think of.

  • 11 - System pass
    12 - RPM unable to reach upper test limit
    13 - RPM unable to reach lower test limit
    14 - Pip circuit failure
    15 - PCM read only memory test failed