My car has been running shitty forever. I installed an a/f gauge and it was reading crazy half the time no LED's other times it goes to stoich and when I give it gas it goes to lean and then no LED's. I thought the O2 sensor was the cause and replaced it along with my new downpipe.(3.15") but it still reads the same. I know the car is running rich because it bogs off the line and you can smell it. Since its not the O2 sensor what do you guys think.

 

you have a narrow band it will read like that.

 

Get injectors cleaned, get compression check, not sure about this one but have heard that the Water Thermo sensor can cause running rich problems, get TPS adjusted, get a general tuneup done and see what heppens. Thats all I can think of doing.

 

No it wont.

At full throttle it should read green.

Jarrett

 

Next we will do a compression check done and change the plugs. I already adjusted his TPS, so thats not it. Thanks for the suggestions so far, any one else have any ideas?

 

I haven't been around rotaries long but here's a story of what happened with my car. my car was running very lean at one point when i took it to a dyno. it seemed to shudder all the time when i drove it, and the 3800 rpm studder was unbearable. when i had it on the dyno one of the guys working there used to have an fc and said that he may have a way to fix it. he popped the cap off my maf sensor and there's a little thing in there that you can turn with little teeth on the outside of it where you can adjust the a/f(at least that's what he did). I don't know exactly how the guy turned it or what he really did but it helped A LOT with the way the car runs. and it got rid of the studder.
just my $.02