Engine light was on code said super boost curcuit A malfuction. I played around with the little switch on drivers fender well tha has line from above egr going to it removed line and put on a gauge to make sure I was gettig boost a quick blip of the throttle gave me 4 psi put line back on tapped on switch wiggled wires code cleared drove car and light stayed off .Any one know if that was the correct switch that I was messing with or did I just get lucky. under hood diagram calls it "MAP" sensor.

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89 Ford F3504x4CC 7.3 IDI turboed Intercooler and running on wvo now powered by a 1997 Cumins
87 300SDL on bio and wvo killed by chevy truck 5-24-06
1999 E300TD black with gray int.