4.6 random mis-fire O2 readings
#1
06-04-2012, 10:28 PM
4.6 random mis-fire O2 readings
I have a 2000 4.6. It is in my Grand Marquis, but the same thing basically.
Here are my data streams for 14 frames while driving at 55 mph. These are #1 & #2 front, short term. Something does not look right, any help as to what is wrong would be appreciated.
This car has a random mis-fire under light to moderate throttle, tq locked, at any speed from 35 to 65 MPH. New COPS, 2nd set of new Motorcrafts, new DPFE, second good TPS, second good clean MAF. Plug wells clean and shiny.
Bank 1
-3.1 / 3.1 / -3.1 /-3.1 /.8 / 2.3 / -2.3 / -2.3 / 0 / -3.1 / -2.3 / 1.6 /-3.1 / 1.6
Bank 2
0.8 / 1.6 / 1.6 / 1.6 / 0.0 / 3.1 / 3.1 / -3.1 / 1.6 / 0.8 / 2.3 / -2.3 / 0.8 / 1.6
I had a stumble on frame 11, and a couple earlier, but not sure which frames.
Here are my data streams for 14 frames while driving at 55 mph. These are #1 & #2 front, short term. Something does not look right, any help as to what is wrong would be appreciated.
This car has a random mis-fire under light to moderate throttle, tq locked, at any speed from 35 to 65 MPH. New COPS, 2nd set of new Motorcrafts, new DPFE, second good TPS, second good clean MAF. Plug wells clean and shiny.
Bank 1
-3.1 / 3.1 / -3.1 /-3.1 /.8 / 2.3 / -2.3 / -2.3 / 0 / -3.1 / -2.3 / 1.6 /-3.1 / 1.6
Bank 2
0.8 / 1.6 / 1.6 / 1.6 / 0.0 / 3.1 / 3.1 / -3.1 / 1.6 / 0.8 / 2.3 / -2.3 / 0.8 / 1.6
I had a stumble on frame 11, and a couple earlier, but not sure which frames.
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