cliffevans

Does Any One Have All 4 O2 Sensors For 2002 Z28. I Think Mine Are Bad.

2001NBMZ28

Why do you think all 4 are bad? Is your SES light on?

Pwebbz28

iTrader: (31)

Uless you are getting MASSIVE ammounts of oil or water into your exhaust your 02's are fine. What is your car doing? First thing to always check is your mass air meter, get some electronic parts cleaner and clean it very well.

cliffevans

My ses light is on and I took it to auto zone and they said it had multipul codes for the o2 sensors, I have a 2002 z28 with 40k

cliffevans

My car is using alot of gas and it doesent seem to be running with full power!

JBsZ06

fwiw..I would check into carbon buildup in the cylinders ...

I had a similiar situation and could have sworn it was bad o2 sensors..

Tech did a top engine cleaner on it and it worked like a charm..

I hear a lot of guys buy something called seafoam but never did it myself.

Increased carbon buildup inside the motor will set knock sensors off at mid rpm ranges due to detonation...and power will take a dump.

I'd at least look into having someone whose done this before help you out and seafoam the engine...or GM top engine cleaner product..

Inexpensive and seems to be caused by the crappy gas we have..

(about 45 k miles on my car too)

HTH

Pwebbz28

iTrader: (31)

Reading a code does not tell you a sensor is bad. The reason they are telling you its the o2's is because its saying your car is too rich or too lean. If your mileage is way down and you have quite a few miles on your car do a tune up and grab some seafoam. 02's aint cheap. Clean your MAF if its not reading the right amount of air it will run rich or lean (more likely).

2001NBMZ28

Did they give you the codes - can you post them?

cliffevans

I have tryed sea foam and got a new air fillter and reset my ses and one day later it came on again?????????????????????// arg

2001NBMZ28

I'm sounding like a broken record here - can you post the code(s)? You can have multiple/duplicate codes for the same sensor. Help us help you.

cliffevans

yeah I can post them the only reason I havent Is because I have to get them again I will get them tomorrow when i go to autoZone ... thanks I need tha help