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03-09-2009, 09:18 AM #11
2003 Z71 Silverado LS
Access roll up cover
Billet Grill insert
CB with PA system
Waiting to be installed
Two 8in RF HX2 punch( would have 12s but they got stolen)
03-09-2009, 09:42 AM #12
The downstream sensors after the cat should not switch rapidly if the cat is working. If the cat is bad the downstream sensors switch rapidly indicating a rich condition and a catalytic converter code is set in memory.
This is the reason for the sensors after the cat. Correct me if I'm wrong cause I'm getting old. LOLJim
2004 SILVERADO 2500HD LS
Pro Comp Leveling Kit
285-75-16 Cooper ST All Terrains
Pro Comp Programmer
Linux Bed Liner
1967 Landcruiser <350 Chevy>
1990 Geo Metro Convertible
2007 FJ Cruiser
03-09-2009, 10:08 AM #1399 Silverado Z71 4.8
2" Suspension lift (Add-a-leafs and leveling keys)
Long tube headers with 3" offroad Y-Pipe
Volant Cold Air Intake with Ram Air Intake Tube
Jet Mass Air Flow Sensor
Diablosport Predator Tuner
97 Suburban K1500
3" Body lift
2" Suspension Lift (Add-a-leafs and cranked up torsion bars)
35" Yokohama M/T's
Airraid Throttle Body Spacer
03-09-2009, 05:28 PM #14
03-16-2009, 03:13 PM #15
the muffler is clear at the back of the truck, great big old round canister looking job "for now" thinking about putting a flowmaster or two on it later on the cat is up near the headers.
If i didn't know that for sure and know for sure what an O2 sensor looks like and where it's at I sure wouldn't have the gall to be on here making repair suggestions for people on here like i have.
most of my posts are usually about things I have either done already myself or helped friends do on thier vehicles. if it's something I don't know anything about at all I won't make any comment about it at all.
Last edited by daddytech; 03-16-2009 at 03:35 PM.
03-16-2009, 03:20 PM #16
Can a o2 sensor failure cause a cat code
After 1996 all trucks have before and after o2s for OBll compliance. I think you just missed yours. Just run your hand over exhaust from cat back. On my 05 Silverado the passenger side rear o2 is hard to see.
03-16-2009, 03:55 PM #17
- Join Date
- Feb 2009
- Somers, NY
Some people forget that part...
Had a friend who hadnt been able to start his car for a few weeks, I got it running for him... after it was idling for 15 mins he decided to put his hand on the exhaust manifold "I didnt think it would be THAT hot"... lol-----------
Stefan - Beacon, NY
99 Chevrolet Suburban K1500 LS (My truck)
CarPC, 1.6Ghz Intel Atom, 2GB DDR2 Ram, 250GB Harddrive, GPS, BT, WIFI, OBD2 Reader, 7" Lilliput Touch, 9" Headrest monitors, running Centrafuse.
Have any computer problems or questions? Just send me a message and I'll see what I can do :)
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