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January 13, 2009, 11:10:01 pm

CODE4LS1

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« on: January 13, 2009, 11:10:01 pm »
I have been working on a '81 Caddy TD project and I bought some fast glow bosh gp's along with a fast glow relay.  I noticed on cold starts, I still have 12v to the buss fuse on the firewall for a couple mins then it will finally shut off.  I have been reading posts where the newer TDI's will have this feature but mine is a 1.6.  Is it possible that I may have a gp relay for a TDI?  Should the gp's stay on a couple mins after cold start?  Thanks in advance for any opinions.
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Reply #1January 14, 2009, 12:32:14 am

Quantum TD

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« Reply #1 on: January 14, 2009, 12:32:14 am »
According to the Bentley, the GP relay will send power to the buss for a few seconds (I think 6-7 on fast glow, 15 sec on slow glow) after the light goes out. Several minutes is a long time for fast glow plugs. If they run like that, you'll burn them out, or do worse.

If you don't have a Bentley, get one for your model. There are test instructions for testing the relay spot in the fuse panel.

In the end, it sounds like either your ignition switch is bad, or your starter relay/starter is not disengaging the relay.

There is a SLIM chance that the new relay is bad, but I doubt it. Just out of curiosity, what the PN on the relay, and who manufactured it?

Anyway, I'd do the troubleshoot in the Bentley, and see what happens.
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Reply #2January 14, 2009, 12:50:13 am

vanbcguy

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« Reply #2 on: January 14, 2009, 12:50:13 am »
My GP relay keeps the plugs on for several minutes after the car has started - as far as I know it's "normal" for TD cars with the 'fast' system.
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Bryn

1994 Jetta - AHU M-TDI - Jezebel Jetta
2004 Jetta Wagon - 1.8T - Blitzen
Reply #3January 14, 2009, 11:25:32 am

CODE4LS1

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« Reply #3 on: January 14, 2009, 11:25:32 am »
It's Bosch gp's and relay.  I bought the fast glow system so maybe this is normal?  Thanks for the replies!
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Reply #4January 14, 2009, 11:40:33 am

Vincent Waldon

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« Reply #4 on: January 14, 2009, 11:40:33 am »
Several Bosch glow plug systems use a 2-3 minute after-glow... standard on AAZs (and most TDIs iirc) for example.

For various reasons I drove with manual glow plugs for a week or so and I really missed the afterglow feature..  the engine is *much* smoother as you pull out of the driveway and with a significant reduction in smoke.

Modern Bosch Duraterms are designed for this kind of duty as well.

Is it normal for your particular relay?  If you post the part number someone with ESI might be able to look it up.

Is it a good feature that you may accidentally have?!  I'd say "yes"!!!
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Vince

Edmonton, Alberta, Canada
2001 silver TDI Jetta Malone Stage 1.5 , 2001 blue TDI Jetta SBIII 216s Malone Stage 3, 1970 Bay Window bus

Gone but not forgotten: 1969/1971 Beetles, 1969/1974 Westies, 1979 Rabbit, 1986 TD Jetta, 1992 gas Jetta, 1994 TD Jetta
Reply #5January 14, 2009, 01:06:34 pm

AudiVWguy

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« Reply #5 on: January 14, 2009, 01:06:34 pm »
So Vince, if you were looking to "upgrade" your glow-plug system, then what ever vehicle this relay and glow-plugs are for, you could retrofit them to your vehicle. Plug and play, right?
Lets find the part numbers!  :D


(I'm sure it's not that easy, but the cold has numbed my brain)
-JB
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Reply #6January 14, 2009, 01:35:54 pm

CODE4LS1

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« Reply #6 on: January 14, 2009, 01:35:54 pm »
Good to know,  I figured it may be normal behavior as the glow plugs would cycle off like clockwork at the same time after every cold start.  I will leave well enough alone.  Thanks for the help!
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Reply #7January 20, 2009, 12:01:08 pm

AudiVWguy

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« Reply #7 on: January 20, 2009, 12:01:08 pm »
CODE,
Could you please provide us with the part number of this relay? I'm sure there are many of us that would consider buying your style of relay over the standard model. Thanks for the effort.
-JB
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Reply #8January 20, 2009, 01:20:45 pm

burn_your_money

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« Reply #8 on: January 20, 2009, 01:20:45 pm »
On a side note, if you have regular fast glow plugs in there you will burn them out. They need to be the duraterms. They have a heat regulating device built into them so they don't overheat
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Tyler
Reply #9January 20, 2009, 01:37:46 pm

jtanguay

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« Reply #9 on: January 20, 2009, 01:37:46 pm »
Quote from: "burn_your_money"
On a side note, if you have regular fast glow plugs in there you will burn them out. They need to be the duraterms. They have a heat regulating device built into them so they don't overheat


good to know! thanks
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Reply #10January 21, 2009, 12:51:52 am

CODE4LS1

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« Reply #10 on: January 21, 2009, 12:51:52 am »
Thx for the intel......looks like I will be looking for some duraterms then.  Anyone have a handle on where to get them or a link?  Thanks!
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