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Why does reading for 02 sensor bounce between lean & rich? this is a new sensor.
1994 Chevrolet Lumina APV

Why does reading for 02 sensor bounce between lean & rich? this is a new sensor.

(1994 Chevrolet Lumina APV)
we have also installed a new MAP and TPI sensor and run Sea Foam thru both fuel tank and and injectors on top of motor.
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on August 06, 2016
It is supposed to switch back and forth! .. What does the trouble codes indicate, rich OR lean exhaust? .. Post trouble code numbers.
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on August 07, 2016
just got this message,as soon as husband wakes up we will check for codes,THANK YOU,had no idea this was how it was supposed to behave ! Makes us feel a little bit better. :-)
codes as follows: 22 1/4 TP volt low reading is .77-.80
24 2/4 VSS no signal
33 MAP sensor high reading is 29 KPA volts.97-.99
45 O2 high volts reading is .07-.99
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on August 06, 2016
It is supposed to switch back and forth! .. What does the trouble codes indicate, rich OR lean exhaust? .. Post trouble code numbers.
Sign in to reply
on August 07, 2016
just got this message,as soon as husband wakes up we will check for codes,THANK YOU,had no idea this was how it was supposed to behave ! Makes us feel a little bit better. :-)
codes as follows: 22 1/4 TP volt low reading is .77-.80
24 2/4 VSS no signal
33 MAP sensor high reading is 29 KPA volts.97-.99
45 O2 high volts reading is .07-.99

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