How do you tell if its bad, the car seems to run rich alot, I used one of them diagnos computers that connect in the engine bay and test parts and i tested the O2 sensor, it said it was fine which ment the engine flashed Rich/Lean at 2.5K RPM or w/e the diag system said to hold the rpm at.....BUT the ca rwas acting weird the diag system was flashing and clicking to the idle of the car NO Joke it was like engine's idle sound went through the diag system, it prolly is a bad ground I believe since the diag system connects through the car's ground.

Any suggestions?

 

check the write up on the grounding of the car so that you can make sure all ground points are connected proper and then you should be able to tell if its a bad ground.

 

I don't understand that post....

However, regarding the O2 sensor, don't bother trying to test it. Just buy a new one for $25 at the auto parts store. Any generic narrowband one wire O2 sensor will do the job.

As for the grounding, disregard all the grounding writeups on this forum. Here's a proper article:
http://www.aaroncake.net/rx-7/grounding.htm

 

I recently checked a local auto parts store here in raleigh for an O2 and it was $100.

 

Don't buy an O2 sensor for any specific model of car. Walk in and ask for a "Bosch one wire O2 sensor, the cheapest you have".

 

AUTOZONE

BOSCH Universal 11027 $17.99

 

Definitely picking up one of those after work, thanks!

 

ight thanks.

But is the clicking of the snap on diag system and flashing of its screen sync'd with the idle of the engine a ground proab it NEVER happened before and dosent do it on other cars...Also when I reved it up the clicking and flashing sped up

 

I have no idea what your "diag system" is so I can't comment...

 

its some type of snap on its red and takes 2 cartrages we put in Jap & someother one and it reconzes the car and everything but i think its a bad ground on the engine

 

Ok so I should just get a standard bosh 1 wire o2 sensor from kregens?

 

haha

Snap on diag thing says the O2 sensor is bad it stays at lean for along *** time then swiches to RICH once and awile, also now the check engine light is on =x

 

for those who wish to know how to test the O2 sensor, here's how:

http://www.diynetwork.com/diy/ab_eng...095162,00.html

 

geezus

that bolt for the sensor is on tight as a ****

We broke the 7/8th's remover
getting a full 7/8ths now