I have an 84Z with horrible gas mileage, and the answers to 4 different questions will help solve why my mpg is so bad

Problem 1:
Were all 3rd gen Camaro's, from 82-92 made with oxygen sensors?

I'm trying to figure out if I'm supposed to have an oxygen sensor or not.

My gas mileage has plummeted from 16 city / 23 highway to 11 city / 14 highway, and Ive been reading that a faulty O2 sensor can cause such drastic changes in mpg

Problem is that I crawled under my car and do not see any O2 sensor. I had my cat cut off, and am wondering if it may have been cut off too. I didn't see any wire though that might have been leading to it.


Problem 2:
Are 84 Camaro's set up so that the check engine light will flash the computer-fault code, as do the later models (ex, '88) fuel injected Camaro's do, when you turn the ignition forward and put the GM key in the computer port?

I had an 88 RS and you turned the ignition forward, put the GM computer key in the computer port, and it flashed the code... 34, 42, whatever. You could hear the computer kick on and make some noise.

Now with my 84Z, it doesn't do anything when I stick the GM key in.

As stated above, I am getting HORRIBLE gas mileage and knowing this code may help figure out whats malfunctioning (ex, O2 sensor)


Problem 3:
Someone one here also pitched the idea that a bad Computer would make the metering rods in the carb stay open all the way all the time

Does anyone know if this is true?

Will a faulty computer indeed make the metering rods do this??

If so, what is the easiest way to fix the metering rods??

I called Autozone, and instead of a rebuild of the carb, I thought about just buying a new one, but they are $499, so Im trying to fix the one I have, if indeed the metering rods can get stuck due to the ECU.




I am sorry to be posting so much, its just Im trying my best to get this figured out since my camaro is my daily driver til I get my truck fixed and the gas money is killing me.

Any help you all can give would me much appreciated.

 

All that were sold in the US were equipped with O2 sensors. It's in the drivers side manifold.


All that were sold in the US will.

That's possible. You could be able to hear the MCS clicking.

 

As for your carb, I have had really good service and dependability from a company called Guaranteed Carburetors. I highly recommend them, and they will also rebuild the one you have if you wish to go that route. Their site is: http://www.guaranteedcarbs.com

 

I also have an 84z28 and wanted to make sure of something. If I hear clicking when I turn the key it means theres something wrong?

 

If you hear clicking from the carb after you turn the key on, it means something is right.

 

What do I need to look at if I don't hear clicking? (I used to, don't anymore)

 

Is the SES light on?

 

Pardon my ignorance.. but whats an SES light?

 

The "Check Engine" light.