One of my headers is cracked, the other is loose and vibrating. Turns out previous owner only installed one O2 sensor as appose to both for the mufflers. I need new headers, are the plugs angled? I was thinking cheap easy fix would be ebay, any suggestions?

 

Vehicle info???

 

I mean I know the amount of money you could work with wasent said, but since you need to fix them or possibly replace them why not get a good set of headers and gain some performance and sound if you have the the headers off?

 

Sry keep forgetting, 89 K5 Blazer. 5.7l V8 I get enough sound from the engine. Performance wise that would be why I am using headers, when it comes down to it in an off road vehicle headers are headers.

 

That Blazer only came with one oxygen sensor. I would just weld up the crack and tighten up the other side.

 

Yes sir only came with one sensor. On a normal basis I would probably go that route. But I have to take her through emissions this year. From what I have been told, they will test both pipes and I will fail.

 

How would you fail if they test both pipes? The only way that I can see that happening is if you have a problem on the other bank of cylinders.

On a TBI motor, the injectors are batch fired so provided that both injectors are flowing an equivalent amount of fuel, both sides of the engine will get the same amount of fuel. You then could have a bank or cylinder specific spark issue (plugs, wires or even cap/rotor) or a cylinder specific compression issue that may affect the results on the non-O2 monitored bank. But, if you pull your plugs and they look very similar in color/condition side to side, you will be fine with the testing. Adding another O2 sensor is not going to fix this as there is nothing in the ECU to facilitate monitoring of two O2 sensors at once.

 

Interesting, I guess I never thought of it that way. This is all a learning experience for me. So I should be fine as long as all my plugs look identical in color correct?

 

You should be. That would indicate that you are getting a similar burn on both sides of the engine.

 

I have a 1988 K5 TBI 5.7l and i just put headers on it but it runs really rich and rough, brand new o2 sensor and idk whats wrong, please help?