We've got a GM tech II and I still use EFI for 99% of scanning and data logging. $399.00 vs $3,800.00 and the choice is easy.
We have a Snap-on Modis...it's a good tool but the versatility and speed of EFI makes the Modis look like dinosaur technology. Modis updates cost alot of money considering we only use it for the big three diesels.
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