Converting to a 1 wire O2?
05-10-2010, 08:54 PM
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Converting to a 1 wire O2? Is there any reason I can't use a couple of the old style 1 wire oxygen sensors on my '93 Blazer which has a 2002 truck harness/PCM? When I built the truck I took out all the O2 wiring since I was running the fueling off a Megasquirt. Now I am taking off the Mega and going to run a 2bar SD tune on the stock PCM
I want to use the 1 wire sensors because they are way cheaper, and 1 wire is obviously easier to add to a harness than 4. The heater in the modern oxygen sensors is just to bring it up to temp quickly for emission purposes right?
I want to use the 1 wire sensors because they are way cheaper, and 1 wire is obviously easier to add to a harness than 4. The heater in the modern oxygen sensors is just to bring it up to temp quickly for emission purposes right?
05-11-2010, 09:50 AM
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That, and to supplement exhaust heat at low flows.
If you're running headers, even a heated sensor may
not be happy at idle. So expect some poor trimming
behavior unless you have it mounted close-in to log
style manifolds.
If you're running headers, even a heated sensor may
not be happy at idle. So expect some poor trimming
behavior unless you have it mounted close-in to log
style manifolds.
05-11-2010, 02:13 PM
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Yes, I am running cast iron exhaust manifolds and I think I have room to mount the sensors real close to the manifold outlet. I am off work Thursday so unless someone gives me a reason between now and then, I am going to try it. I was going to use the "simulated" narrowband output from my LC1 but I think real sensors would be better...