Different O2 Sensors
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Joined: Feb 2010
Posts: 677
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From: Metairie LA
Different O2 Sensors
Just some FYI
I have been tuning my 86 385 HSR and feel like I have been chasing my tail trying to BLM's in line (due to many reasons including mechanical issues which included changing the heads - and cam while I was in there)
I was using a Bosch 13190 for a heated O2 sensor in the Drivers Long Tube Header. I have an AEM WB in the Passenger side. They never seemed to match.
I was reading on Thidgen about using the AC Delco AFS74 as it s supposedly calibrated to GM's O2 tables.
It is a night and day difference. Now suddenly the WB matches and the engine appears much happier.
From what I can tell and the WB readings - the Bosch was making me run really lean.
I have been tuning my 86 385 HSR and feel like I have been chasing my tail trying to BLM's in line (due to many reasons including mechanical issues which included changing the heads - and cam while I was in there)
I was using a Bosch 13190 for a heated O2 sensor in the Drivers Long Tube Header. I have an AEM WB in the Passenger side. They never seemed to match.
I was reading on Thidgen about using the AC Delco AFS74 as it s supposedly calibrated to GM's O2 tables.
It is a night and day difference. Now suddenly the WB matches and the engine appears much happier.
From what I can tell and the WB readings - the Bosch was making me run really lean.
