I want to replace the oxygen sensors on my 2000 model 5.2 Sport 1500 4x4

my truck has no sensors in the stock manifolds,

it uses a total of two sensors,

one before the cat and one after the cat, it has a single pipe exhaust system

Every place / company I try list up to eight different part numbers to fit this truck, most also say it should have three, one in each manifold, and one post cat, my manifolds are stock and have a boss cast on each side for a sensor, but these have never been drilled or tapped to accept them.

even tried NGK/NTK tech help direct, and they are telling me my truck should have 3 sensors, one in each manifold and one post cat

they list different part numbers for the left and right unstream sensors, and the guy does not seem to believe me that I only have one, he thinks my truck has been modified or something, but I know its stock


Can anyone give me some help and or advise please ?

or even part numbers???

even hughes engines list a right hand or left hand front sensor, I have read that its a possibilty that the 2500 or 3500 may have dual upstream sensors, but my 5.2 1500 sport does not

 

you need to list the year of your truck.. this makes a significant difference.. cali or federal emissions?

 

rock auto should have the sensor you need. if you only have one upstream it will be the right side. the differences are the wire lengths. but drew is right about knowing what year and if it a californa emission. they need a left and right.

 

Sorry, you are quite right, its a 2000 model non-cali

vin 3B7HF13Y8YG118***

thanks

 

You should have upstream (pre cat) left, upstream (pre cat) right and a rear one (after cat). There are not any on the manifold. Is there a specific reason you are replacing your o2 sensors?

 

Yes, although not using much oil, I can see a fair bit inside the keg, still has the tin belly pan on manifold, so I want to do the plennum conversion, every time I start the truck, hot or cold it will drive okay for about 1/4 mile then stumble and pop and splutter , but clears if you give it one big foot of full throttle, will drive all day okay until you switch it off and re-start again,

also, this truck has 135,000 miles on it and the O2 sensors have never been changed, the 9 miles per gallon I am getting driving easy is also telling me something aint right, I want to do the plennum and change the two sensors at the same time

 

managed to read the part number off the old sensors, both are 56041212A, the guy at NTK has accually been quite helpfull in the end and has cross-referenced that to their part number 23099, so I will order up two of these from hughes engines wil the plennum kit

 

There is no reason to change out the o2 sensors until after the plenum fix. They will foul out and have to be replaced again. Don't forget that your cat needs to be changed out as well. You can get a magnaflow cat put on by almost any reputable exhaust shop in your area for about 150-200.

 

True, but it is easier to order the parts at the same time to save a bit on postage, I can get no parts for this truck at all here in Ireland, they where never sold here, so have to order everything from the US

I am hoping that the O2 sensors will help the MPG, I have not read the signals on the scope yet, but will take a look and see how clean they switch, I just think with the milage on this truck they are bound to be a bit contaminated and under performing

 

That many miles on an o2 is definitely pushing designed expectations, and they no doubt are not in parameters, but.... When is the last time you pulled your throttle body off and cleaned it really well? The iac gets to be quite a mess in short order.. and can cause situations as you describe..