(11-12-2020, 11:35 PM)fixkick Wrote: as you can see driving and plotting any errant OBD2 car can be really revealing. above software is. Palmer scan software
https://www.palmerperformance.com/store/...ucts_id=36
even log CVS files and import them into Exel. and graph anything you what, even hours of data.
I don’t currently have a scan tool that can read o2 sensor data just a code reader but I had it at a shop that pretty much gave up on figuring it out. They told me that both o2 sensors were reading fine. The injectors passed the leak down test and and are all flowing the same according to my fuel pressure drop on my cheapo flow tester. Since my last post I replaced the cracked exhaust manifold with a stainless header and seems to run just as rich as before. Looking at the spark plugs they don’t seem to be wet or look as wet as I would think they should for running rich. Also the misfire on cylinder #3 is becoming more consistent but the only way to make it do it is driving at top speed for a few miles with my foot to the floor then the light continues to flash even after decelerating but I still can’t feel a change I how it drives while it’s flashing. Could it be possible that I am mistaking rich exhaust for coolant in the exhaust? The engine has new cap, rotor, plugs, and wires about a year ago. In the next couple days I’m going to borrow a friends fancy snapon scan tool to get better data.