[Vwdiesel] Glow plug intermitancy

[Tony and Lillie]

Nick, is the 10V with the glow plugs running, ie connected? If so, I'd 
disconnect them and see what you get. Also, the coolant temp sensor will 
just not fire them at all if it's warm enough. If you still have low power, 
I'd start checking all the power and grounds for starters, then maybe the 
fusebox.

Tony Hoffman

----- Original Message ----- 
Subject: [Vwdiesel] Glow plug intermitancy


> Well I have been trouble shooting a glow plug problem. Seems that when I
> turn on the key the glow plugs are not getting 12v to them, so I took the
> relay out and it looked ok and when I checked it with a  multi meter it 
> was
> ok for the checks that I did. I have talked to Val some on this. The
> contacts in the relay look great. When I do a continuity check and close 
> the
> contact it gets continuity. I checked the to main post on the resistor and
> when it is plugged into the fuse block and it is seeing 12v's.
>
> After messing around with it, I was able to get 10.5v's to the glow plug
> fuse on the firewall. The pattery is putting out 12.56v's when I checked 
> it.
> Do I have a power loss somewhere and the fact that the glow plugs are not
> seeing a full 12v's is an issue?  This last check the relay seems to work.
> The GP fuse was getting the 10.5v's for a count of 8 and then it went out.
> Does that sound about right.  I couldn't see where the terminals inside 
> the
> fuse block were pushed in at the relay connector.
>
> I was wondering if the coolant sensor might be coming into play? Could it 
> be
> going bad? If it was sensing that the engine was warm then the glow plugs 
> do
> not work correct? Or do they still come on but it is only for a split
> second?  All other fuse's are good from a visual stand point.
> >
> Nick
>
>