1987 Chevy Celebrity code 45

Hello –

To better assist you what is your engine size in liter and the 8th digit of your VIN.

its the 2.5...8th digit is R

Hello –

Thanks for the info……..

For running rich it may be your manifold air temp sensor, coolant temp sensor, or oxygen sensor which you say you changed. For rough idle it could be any number of things but possible throttle position sensor or mass air flow sensor.

Now it could also be plug wires, plugs etc……..when was the last tune up?

If we have information in the manual for checking the above sensors would you like it?

Hello –

Also how many miles are on the vehicle……..was it idling rough after the change of the 02 change or before.

Have you checked all your vacuum hoses for cracks, loose connections etc……a vacuum leak will also cause a rough idle

you have two oxygen sensor, you need to replace both of them

My car is running fine now, I replace the egr valve with the old one, the one I returned near positive it was the wrong one I have a guy look at the parts store if I had more than one oxygen sensor I only have the one. The having that code 45 every once in awhile is the least of my problems now that I got it running the way it used to I read somewhere that it could be my charcoal canister I don't know if they plug up or what hope all is well thanks for your time