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Oxygen sensors....? #379201 07/18/09 06:17 PM 07/18/09 06:17 PM
Joined: Nov 2006 Posts: 196 West Central Indiana M Mr.Runum OP member
Mr.Runum OP member M Joined: Nov 2006 Posts: 196 West Central Indiana	Do Oxygen sensors go bad gradually or, do they either work or they don't? 02 Ram 2500 4x4 has a slightly rough idle when warmed up and has had a recent tume up. Also MSD (ignit, coil, plug wires) shorty headers, K&N, Superchip. Any other thoughts? 69 RoadRunner 383 4spd coupe, 06 Hemi Daytona Charger, 08 6.7 RAM QC short bed 3/4 4X4

Re: Oxygen sensors....? [Re: Mr.Runum] #379202 07/18/09 08:28 PM 07/18/09 08:28 PM
Joined: Feb 2003 Posts: 8,697 A Andrewh master
Andrewh master A Joined: Feb 2003 Posts: 8,697	do you have a code? They go bad for various reason, usually over time, but you wouldn't necessarily notice.

Re: Oxygen sensors....? [Re: Andrewh] #379203 07/18/09 09:22 PM 07/18/09 09:22 PM
Joined: Nov 2006 Posts: 196 West Central Indiana M Mr.Runum OP member
Mr.Runum OP member M Joined: Nov 2006 Posts: 196 West Central Indiana	Not geting a code yet but, could it be going bad and not give a code? If I had a code come up I can read it with the superchip and I have a code book. Problem could still be ignition, been eating cap and rotors. Installed cap & rotor with brass instead of aluminum electrodes. Mr.Runum 69 RoadRunner 383 4spd coupe, 06 Hemi Daytona Charger, 08 6.7 RAM QC short bed 3/4 4X4

Re: Oxygen sensors....? [Re: Mr.Runum] #379204 07/18/09 10:05 PM 07/18/09 10:05 PM
Joined: Jan 2003 Posts: 18,426 UPPER MICHIGAN, MARQUETTE COUN... N NITROUSN I Live Here
NITROUSN I Live Here N Joined: Jan 2003 Posts: 18,426 UPPER MICHIGAN, MARQUETTE COUN...	Intake plenum gasket leaking.

Re: Oxygen sensors....? [Re: Mr.Runum] #379205 07/18/09 10:07 PM 07/18/09 10:07 PM
Joined: Aug 2008 Posts: 286 Catskill, NY T teflon enthusiast
teflon enthusiast T Joined: Aug 2008 Posts: 286 Catskill, NY	Would that have a 5.9L V8? I have seen a lot of cracked cylinder heads. A proper scan tool that can read real time misfires will pick up that miss.

Re: Oxygen sensors....? [Re: NITROUSN] #379206 07/18/09 11:35 PM 07/18/09 11:35 PM
Joined: Sep 2003 Posts: 1,168 Vancouver, WA MoparMarq super stock
MoparMarq super stock Joined: Sep 2003 Posts: 1,168 Vancouver, WA	Quote: Intake plenum gasket leaking. Might be worth checking. Recent MA article by E-berg talked about this very thing. Symptoms were "lousy idle, stalling, high oil consumption - leading to detonation damage and lots of carbon. How to test (engine installed and running)? Disconnect PCV hose, plug the hose and cap the nipple. Plug any and all make-up air hoses/caps (breather). Remove the oil cap and place your palm over the hole (engine at idle). Feel any vacuum (suction)? The gasket is shot." I've also heard - don't know for sure - that you can look down through the throttle body (engine off) with the throttle plates open to look for oil residue on the plenum base. Oil means the gasket is shot.

Re: Oxygen sensors....? [Re: Mr.Runum] #379207 07/19/09 12:29 AM 07/19/09 12:29 AM
Joined: Feb 2003 Posts: 8,697 A Andrewh master
Andrewh master A Joined: Feb 2003 Posts: 8,697	unlikely you would get a bad one and not get a code. You have 2 per cat. One before and after. If it were not throwing a code, both sensors would have to fail in a funny way so you wouldn't get a code from either one. I suppose it is possible, but unlikely. I agree, if it is a magnum that beer barrel intake was a poor way to do it. There is an upgrade gasket that is supposed to fix it. 12 ft pounds on the intake bolts, and I am pretty sure they are replace the bolt one use things.

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