Everytime I start the car my air/fuel guage shows me that it's running rich. But after about 5-10 minutes later it shows that the car is running normal at idle. Has anyone else experienced this.

 

typically the a/d guages you get, like autometer suck becuase it is a delayed signal. unless you have a greddy yugo or another type of realtime wideband, the display wont be too accurate. the autometer guage ususally bounces back and forth, thats normal

 

Oh ok well that makes more sense. Well thanks for the response ek.

 

np

 

also when u 1st start up the car it will always show a rich reading because the O2 sensor is still cold. it needs to be heated up for about 30-60 sec's before it starts to work good.