5.3 swap possible MAF or O2 sensor issue?
10-28-2016, 07:57 AM
#41
The way one would typically solve these problems (when you don't get discrete OBDII fault codes) is to look at graphs of these sensor responses over time. Looking at this freeze frame data won't tell you much.
For example, in the graph below, you can see air flow (through the MAF) is responding exactly with the TPS position. You can't tell that by looking at just a single point in time.
10-30-2016, 11:33 AM
#42
I don't know. I think you need a different tool and/or local help with a different scan tool to get to the bottom of things.
The way one would typically solve these problems (when you don't get discrete OBDII fault codes) is to look at graphs of these sensor responses over time. Looking at this freeze frame data won't tell you much.
For example, in the graph below, you can see air flow (through the MAF) is responding exactly with the TPS position. You can't tell that by looking at just a single point in time.
The way one would typically solve these problems (when you don't get discrete OBDII fault codes) is to look at graphs of these sensor responses over time. Looking at this freeze frame data won't tell you much.
For example, in the graph below, you can see air flow (through the MAF) is responding exactly with the TPS position. You can't tell that by looking at just a single point in time.
10-30-2016, 07:03 PM
#43
I want to thank you tremendously for all of your knowledge and help buddy. After further investigation we determined the bank 1 and 2 were swapped on the harness which caused every issue I was having. Swapped the banks around and now the truck pulls hard and fuel trims look promising even with exhaust leaks. I owe you a beer man!
So, just the left and right side banks were switched, or were the pre-cat and post-cat sensors switched?