Quote:
Originally Posted by MTUpower
Do you or does someone else have a pic of the Ford solenoid modification ? My stock glow plug relay stays on for only 6 seconds and when cold the engine stumbles a bit for the first 30 seconds.
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Vstech is correct on all points.
The glow plug relay in an '84 w123 sedan I bought and re-sold did that - stayed on for 6 seconds or less. I replaced it with a used unit I bought off a well known auction site. Once replaced everything was fine. The PO had no idea why it would not start in the Colorado winter cold. I even found cans of starting spray stuff in the trunk. Glad no damage was done! If you listen carefully you can hear the glow plug relay "pop" when it shuts power off to the plugs. In most of my cars it's about 18 - 20 seconds after the seat belt warning buzzer stops buzzing. You can also see a subtle change in the brightness of the "idiot" lights along the bottom of the instrument cluster - the brake and battery indicator lights. They brighten ever so slightly when the power to the glows stops. That's the hottest point in the cycle and my cars like to be started at that point. Some people start the OM617 that way no matter what the engine temp - or outside temp for that matter. I always run the full cycle on cold (engine) start and when starting the engine already at operating temp, I wait until the seat belt warning buzzer stops and then hit it. That's maybe 10 seconds or so. I pay no attention whatsoever to the glow plug light on the dash. Hope this helps!