Posted by jdemaris on February 19, 2008 at 05:24:29 from (67.142.130.11):
In Reply to: Goose... posted by Bob on February 18, 2008 at 19:57:38:
I don't know what he's referring to either - but GM DID use a "glow plug inhibit switch" on most of the pre-1990s 6.2s. It's just an electric sensor that screws into a coolant port. It loses continuity when the coolant gets warm and prevents the glow-plugs from working. For that, a common fix IS to bypass. I think he's got his circuits and solenoids mixed up. The C-code,light-duty 6.2s DO have several electric-to-vacuum solenoids hooked to the fuel injection pump and vacuum pump, but they have nothing to do with the glow plugs. They control converter lockup and emissions-controls. Also, GM diesels in LUVs and S10s use a fast-idle control on the injection-pump that is electric solenoid to vacuum controlled via an electric coolant sensor. But, those GMs have 2.2 Isuzu diesels, not 6.2s, and it still has nothing to do with the glow-plugs.
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