Hello all,
2010 Chevrolet Cobalt SS here, not sure if my question should go here r in the L4 forum, but here goes...
I have p0497 engine code for EVAP low purge flow. I've been tuning my car for a while with the help of a lot of great tuners on this site and cobalt ss, car runs great. Using MVPI plug-into-laptop method. I'm looking to log the things GM says to do while diagnosing this DTC, most notably the steps like:
"Seal EVAP system using purge/seal function" or if this special feature isn't available, I'd like to know how to do this step "Observe FTP (fuel tank pressure) sensor with a scan tool, should be more than two volts". I can upload my tune file and my scanner configs, perhaps I can add the scanner and/or graph for that sensor so I can log this?
I can fix 100% of my car's issues on my own, but this EVAP stuff is kicking my butt. Need to pass inspection. I have stock downpipes but cats removed because they clogged up on me so I smashed them out. A leftover item from a Halloween party, I have a fog machine that I used to fog out all my EVAP lines, they're clear and leak-free. I blew them out with low pressure air, >5PSI, in case any carbon was in the lines.
At a loss for how to fix this, and how to use HPTuner software to assist me with finding the root cause. Any assistance would be appreciated, thanks!