Mechanics

FORD F-150 STALLS PROBLEM

1992 Ford F-150 • 120,000 miles

Code 998, no vref to tps, map, hego, or ect. No vref coming from pin 26 on harness. ECM failure? Or possible ground problem? Truck runs, but, very rich, stalls, etc. Checked/ cleaned chassis grounds, as well as ohmed pin 46 (ecm ground).
have continuity to ground. Anything else before I buy a new ecm?
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Guest
November 27, 2012.



Make sure the powers are there. If they are, yes you have a failed ecm

Roy

ASEMaster6371
Nov 27, 2012.