Check the plug on the MAS. Right after the airbox on the intake tube. (The only thing metal on the airbox side) It will have a harness pluged into it. The little c-clip thing that holds the plug on was not there when I bought the car. Shortly there after I had the same problem. I just zip-tied it and haven't had a problem yet.
Just something to check.
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92'240sx fb
77'280z Motor all done, now the rest
87'Ram 250, 383 4 speed, 4x4(sold to my pop's)
97'Hardbody, 4x4(new toy)
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