You can make dyno runs without tuning your car & see where your AFR is...unsure what a Dyno shop charges.
Our local shop use to be $50 for 2 pulls & he's gone up to 75...he also gives out printed sheets w/graphs,whp,wtq,and it shows AFR.
Custom tunes start around 600+ (this includes license).
I added FI TP's,exhaust & a CAI (didn't move the placement of my mafs) and it ran 12.20AFR before taking to get a tune...it never threw a cel & drove 5-600 miles before going to Z1 for a tune.
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