Show:
Sensors
Fuel Trim
O2 & AF Sensors
O2 Sensors Pt2
Potpourri
100
What are the load sensors?
MAP and MAF
100

What is fuel trim trying to achieve?

A/F mixture of 14.7:1 (450mv)

100
What is the most common O2 Sensor?
Zirconia (creates voltage)
100

What do O2 sensors need to work?

Heat and Difference in O2 concentration

100
What is TP adjustment at steady throttle?
0% correction
200
What can a faulty TPS sensor cause?
Hesitation on Acceleration
200
What happens to short and long term fuel trim after a proper repair?
Short term and long term will go opposite, eventually returning to zero
200
What is the purpose of a rear O2 sensor?
Feedback for catalytic efficiency
200
What temperature range does an O2 sensor work at?
500F-1500F
200
What sensors are used for Speed Density
MAP and RPM sensor (crank and cam together)
300
What two sensors compare for rationality testing?
TP and MAF/MAP
300
What happens to fuel trim after repairing a restriction?
Fuel trim goes negative
300

What is the range of a wideband O2 sensor?

10:1 - 23:1

300

How many amps does the Heater circuit need heat a O2 sensor?

What is 0-2A

300
Where is the MAF located?
Before the throttle plate, on intake tubing
400

How can a IAT sensor read 396 degrees Fahrenheit

What is a short?

400

How can a Positive fuel trim at idle and 0 fuel trim at 2500rpm be possible?

What is vacuum leak?

400

What is a working range for an O2 sensor?

What is .1V to .9V?

400

What is used to keep AF sensors stoichiometric?

What is a pumper cell.  

400
What happens to vacuum as load increases?
Vacuum decreases
500

How many APP sensors are typically used on vehicles equipped with it? What are some of its advantages?

2-3 sensors No mechanical cable for throttle No cruise control module Delays rapid torque application Pumping losses reduced Smooth engine operation

500
How long does it take for closed loop to take place?
About 10 seconds
500
Where is Bank 1 Sensor 1 located? Bank 1 Sensor 2?
B1S1 - Before Cat B1S2 - After Cat
500

What is a pumper cell 300mA condition?

What is Lean Condition?

500

What is LAMBDA reading of .8?

What is a Rich condition?