I haven’t noticed if anyone asked about shifts. When you shift into gear out of park is it smooth or kinda clunky, or during gear changes on the road is smooth or rougher than normal shift? My mind is moving towards torque converter..
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Yeah, that is one possibility I am considering. It actually shifts smoothly, no clunking, no slipping gears. So I can still hope!
Before I face the possibility of tranny work, I am trying to eliminate vacuum leaks as a possibility, thanks to the suggestion of bigdogchrisl.
So, I learned that fuel trims can help diagnose a vacuum leak. While the epoxy is drying on my DIY smoke machine, I have a question about interpreting fuel trim data.
Here is some data, followed by my question:
**First numbers are at idle, second numbers are at 2500 rpm**
short term fuel trim bank 1: 0 to 5.5 // 1.6 to 1.9
short term fuel trim bank 2: .8 to 5.5 // .3 to 4
long term fuel trim bank 1: 7 // -3.1
long term fuel trim bank 2: 2.3 //-4.7
My question is this: given that the long term fuel trim in both banks drops quite a bit, isn't that usually indicative of a vacuum leak?
Also, does the fact that the LTFT is negative in both banks mean anything?
My rig is still not throwing codes.