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[grantman55]

And if you don't have a MAF Calibrator, or other form of tuning device installed on the truck your tuner is correct. The stock ECU can not be tuned.

what does a maf cal do and where can i get one and about how much ?

 

[FinnJ]

The stock ECU can not be tuned.

OVT seems to can: https://www.tacomaworld.com/threads/volant-intake-with-ram-air-scoop.470215/page-4#post-15252222