Thread: UVCH
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Old Sun, January 10th, 2010, 10:26 AM
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A very common failure results from oil intrusion into the connectors. The oil will get between mating terminals (inside the connector) and cause resistance. Resistance equals heat. Once the terminals get warm, they loose tension on their mating terminal and begin to melt.

Usually the connector inside the valve cover gasket will come halfway unplugged and cause glow plug concerns and in extreme cases, IDM codes for injector circuit problems. Keep in mind that once an injector circuit is suspected to be open by the IDM that the IDM will kill the entire bank of injectors.

The 95-97 trucks seem to be less susceptible to connector separation.

Good call, Dave.
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Tuning, PCM flashing, and burning chips for 7.3s since 2008. Repairing all aspects of 7.3L Powerstrokes for 25 years.
Eight 7.3L PSDs in the driveway including a 1994 Crown Vic and 1973 F100/2002 F350. Looking for the next victim.
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