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Old August 14th, 2006, 10:52 AM   #3
hoo dat. wat.
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Originally Posted by Hombre
I have a '97 Dodge pickup with a 5.9 engine. It has dual exhaust (Flo-Masters). There is no catalytic converter on it. Of course, I get the "Check Engine" light all the time and it's driving me nuts.

Both the upstream and downstream O2 sensor were removed. Will one of the O2 sensor simulator's work and keep the "Check Engine" light from coming on? Also, with a simulator attached will the "Check Engine" light come on if another problem is detected?

With the upstream O2 sensor taken out, will my air/fuel mixture be o.k.? Will the ECM be damaged without having the upstream or downstream O2 sensors? Which O2 sensor simulator should I buy? Thanks for any help.
You need both sensores for your engine to operate correctly, however, you can get by with just the front O2 sensors.

You'll pay for them in the first month on fuel savings alone.
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