Ok, guys, my '94 Z is running real ****ty. It's been stumbling and having a really rough idle when coming to a stop. It doesn't feel bad when I'm accelerating. I wasn't getting any codes. Now as I was driving my friend saw huge amounts of black smoke out of the exhaust. So I'm like WTF? Finally an SES light. Well it says left 02 lean, map sensor and tps sensor. Why the heck would it be throwing all of these at the same time? The car was running perfect until all of a sudden the rough idle appeared out of nowhere. Any ideas? I'm going to order the sensors and replace them. Could it be my Opti going? Any info would be appreciated. I miss my car!

 

anyone have any ideas?

 

does the car act up when its cold? first couple minutes of driving.

O2 sensors like to read lean before they die so replace the O2 sensor first and see what happens. i find it hard to believe all those sensors could go out all at once. its possible one sensor malfunctioning could affect all the rest if they are connected to the same circuit in the fuse box. since the O2 sensor is most likely your problem.. change it and see if all the rest clear up.

 

If your TPS has a problem, it could conceivably cause a MAP code (depending on the specific code) if the engine was running poor enough. Could have an effect on the O2 sensor, but seems that could be unrelated, too. If you had a scan too, you would be able to tell quickly. I would suspect the TPS first.