Mud in my Veins
Join Date: Dec 2000
Location: Memphis, TN
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Re: ACT Sensor???
On early (MAP) 5.0L's, the ACT was screwed into the intake manifold on the driver's side in the 4th runner from the front. I think it has only 1 wire, but I don't remember the color. The element is exposed in the airstream, and is very fine, so it may well be broken.
It should definitely be replaced, and should be easy and cheap. The engine is running in the "limp-home" mode, which may be the reason for the poor performance.
83 Custom w/95 4.9L EFI, 78 NP435, 83 NP208, 83 D44IFS 3.07, 87 Ford 8.8ABS 3.08, Michelin LTX AT 31x10.50R15