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icetherice
Member
- Joined
- Sep 22, 2018
- Messages
- 60
- Reaction score
- 3
- Points
- 8
- Location
- Nashua, NH
- Vehicle Year
- 2000
- Make / Model
- Ford
- Transmission
- Manual
Few months back a new MAF solved my P0171.
Now I have a P0172. I think HO2S1 is finally kicking the bucket because I've gotten many more 'dropped voltage' spikes. The anomaly I was seeing last time I played with my datalogger when I was chasing the lean condition.
Going to drop the whole exhaust later today when it warms up above zero.
Something interesting that I found while logging was that my TPS doesn't appear to return to 'true zero' while driving. When I first start my truck and I'm letting it idle the throttle position is sitting at 17.6%. When I snap the throttle shut to engine brake the TPS only returns to 18% and she continues to gurgle and pop out the exhaust. I don't feel the true effect of engine braking and the HO2S1 voltage doesn't lean out, it continues to oscillate.
Is this something that a bit of WD-40 will fix or is it time for a new TPS too??
Now I have a P0172. I think HO2S1 is finally kicking the bucket because I've gotten many more 'dropped voltage' spikes. The anomaly I was seeing last time I played with my datalogger when I was chasing the lean condition.
Going to drop the whole exhaust later today when it warms up above zero.
Something interesting that I found while logging was that my TPS doesn't appear to return to 'true zero' while driving. When I first start my truck and I'm letting it idle the throttle position is sitting at 17.6%. When I snap the throttle shut to engine brake the TPS only returns to 18% and she continues to gurgle and pop out the exhaust. I don't feel the true effect of engine braking and the HO2S1 voltage doesn't lean out, it continues to oscillate.
Is this something that a bit of WD-40 will fix or is it time for a new TPS too??
