Quantcast




All times are UTC - 6 hours [ DST ]




Ask A Question Reply   
Author Message
 

contributions: 1
I have a 93 chevy C1500 with TBI. While driving check engine light comes on. Until the code is erased, idle engine speed fluctuates and eventually shuts off. The code says bad O2 sensor. Don't believe this is the problem since I've replaced it twice. Also, the fuel pump has been replaced twice, plugs, wires, distributor cap rotter and coil, EGR valve, MAP sensor, TP Sensor, cleaned off all engine grounds and none of that fixed the problem. Any other suggestions?


Share on FacebookShare on DiggShare on DeliciousShare on TechnoratiShare on TumblrShare on Google+
   
Reply with quote  
* Search   
 
User avatar

contributions: 1928
Images: 37
Location: Oregon
what is the code number that you believe says bad O2 sensor?

is the code for rich or lean, or is it for not changing between rich and lean enough times. Have you looked at you O2 sensor signal? it should go over 0.8 and under 0.2 back and forth. If it is hot it should be pretty rapidly. If you pump the gas pedal a few times it should go rich for a little while. If you open a vacuum port it should go lean. Your fuel trim should be around 128 for short term and long term. Drive with the scanner hooked up and watch the O2 sensor and the fuel trims to see what is happening.


   
Reply with quote  
Ask A Question Reply   


   Similar Topics   Author   Replies   Views   Most Recent 
New Articles View the first 2003 GMC Sierra squealing and check engine light

in GMC Trucks

kwj

2

1061

Fri Nov 21, 2014 3:45 pm

kwj View the latest

New Articles View the first Smog Test/Service Engine Light

in Chevy S-10 Pickup

chevyfan

3

873

Sat Nov 08, 2014 7:03 pm

carriedi View the latest

New Articles View the first 95 Chevy Silverado Crazy Mil Light Problem

in Chevy Silverado

docclock

1

22

Fri Feb 24, 2017 11:45 am

carriedi View the latest

New Articles View the first 1993 chevy 1500 battery light on

in Chevy Silverado

redneck63

1

1165

Mon Apr 06, 2015 5:38 pm

carriedi View the latest

New Articles View the first 07 Chevy engine swap

in Chevy Silverado

Taylor25

3

846

Mon Nov 30, 2015 1:56 am

carriedi View the latest

New Articles View the first 1997 chevy Silverado engine stalling

in Chevy Silverado

CrzyTexan

2

1498

Wed Oct 26, 2016 7:30 am

97z71 View the latest

New Articles View the first 1994 Chevy K1500 Engine swap

in Chevy Silverado

jeter7

1

907

Fri Mar 06, 2015 3:20 am

carriedi View the latest


All times are UTC - 6 hours [ DST ]



Search for:
Jump to:  
Contact Us