many questions

[evotech240sx]

hello ppls. i got a few questions to ask you guys and hopefully you all can help me out.

1) with my headlights extended and i start going high speeds, it jiggles. i want to know if you guys can help me fix it since it gets annoying to the driver in front of me. i checked all the bolts and they're all tight.

2) the C3 Invadar bumper, does it require for you to take off the anti-collision bar to have the bumper fully installed, because i had to do it in order to put my bumper on.

3) just recently, i had my air/fuel ratio gauge installed, and right now, it only reads "extremely rich". when i had it installed, i had a new O2 sensor installed at the same time. they said that the gauge could not be calibrated. so whenever i start the car, the gauge resets to "lean" and then goes back up to "extremely rich"

so yeah, that's about it. if anyone can give some advice on what they experienced with all this, i'd really appreciate it. thnx for the help!

[niznos]

Don't know about 1 or 2, but on 3: The air fuel ratio gauge will read way off at start up, that's because the oxygen sensor will not work right until it's at operating temp. The ECU knows this and will ignore the o2 sensor until it is sending a signal it sees as a good one. Once at normal exhaust temp, and at steady throttle (such as going steady at less then highway speed) it should bounce from all the way lean to just at the stoich. and rich border. This is due to the ECU's constant adjustments to the mixture while cruising. When decelerating, it will go blank since the ECU completely leans it out when coasting. Lastly, at about 2/3 or more throttle, or above around 70 mph, it should read in the middle of rich.

If your gauge is reading much different from this, you have a bad gauge, bad install, or somethings is wrong with your car.