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The engine should run fine without the maf plugged in.
Limp home mode should give a rock solid idle that stops at 2500rpm~
I suggest the ecu or injectors are the problem if it won't idle without a maf
And it's got fouled plugs now if you've been running rich for a while. Which means misfires no matter what you do or fix.
always disconnect O2 sensors when diagnosing fuel issues
always pressure test with 15psi+ frequently, every month or at least every few months until satisfied nothing is changing.
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