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most 4L mudder, rock and creek crawler and logging road racers here convert over to a OBDII EEC-V harness, sensors and PCM
much easier to tune and troubleshoot
the EEC-IV stuff is disappearing quickly, almost no support
I've found that to be true as well.
Are any of you aware of any DIY projects for EEC-IV monitoring? I assume things like the Rotunda STAR tools can monitor LTFTs and such on EEC-IVs, is it insane to consider reverse engineering a portion of the feature set in a homebrew device?