LT and ST fuel trim reads high in data log
08-31-2020, 11:41 AM
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Re: LT and ST fuel trim reads high in data log
Huge file, and probably not worth putting a lot of time into. Based on a quick run through:
- there are 8 cells where the LTFT's are at, or approaching 160. This should be obvious from a quick glance. It's not getting enough fuel.
- there are 6 cells (4, 10, 12, 13, 14, 15) you never drove in, in spite of the huge file (637,000 pieces of data). Again, based on a quick glance, you never got the engine over 2,777 RPM. You need to get some aggressive driving in to cover all the cells. It never went into power enrichment mode, where a fuel problem will show up even worse.
- there are rows and occasional individual spreadsheet cells of totally corrupt data Excessive interference on the data line????
- there are random DTC codes popping up and disappearing. Interference on data line ????
You have to sort out the fueling problem.
- there are 8 cells where the LTFT's are at, or approaching 160. This should be obvious from a quick glance. It's not getting enough fuel.
- there are 6 cells (4, 10, 12, 13, 14, 15) you never drove in, in spite of the huge file (637,000 pieces of data). Again, based on a quick glance, you never got the engine over 2,777 RPM. You need to get some aggressive driving in to cover all the cells. It never went into power enrichment mode, where a fuel problem will show up even worse.
- there are rows and occasional individual spreadsheet cells of totally corrupt data Excessive interference on the data line????
- there are random DTC codes popping up and disappearing. Interference on data line ????
You have to sort out the fueling problem.
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