Re: 6.2 Diesel starting help

Posted by Goose on February 18, 2008 at 18:17:38 from (199.184.119.22):

In Reply to: 6.2 Diesel starting help posted by JCSinGA on February 18, 2008 at 14:53:47:

I once had an '85 GMC conversion van with the 6.2 diesel. It developed approximately the same problem.

I found out there was a vacuum relay behind the right cylinder head that disconnected the glow plug electrical circuit after the engine started and vacuum came up. It had failed, so the glow plugs never got power, regardless of what the light said.

GM's practical solution in the field was to simply bypass it, as it was totally unecessary. By the time the engine starts, the glow plugs have timed out anyway, so why would it need a vacuum relay to disconnect them? I plugged in a short bypass wire, solved the problem, and drove it another 50,000 with no problem.

Replies:

• Goose... Bob 19:57:38 02/18/08 (1)
  • Re: Goose... jdemaris 05:24:29 02/19/08 (0)

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